diff --git a/boot.php b/boot.php
index 15341c0fed..6fd7c30372 100644
--- a/boot.php
+++ b/boot.php
@@ -993,7 +993,7 @@ function notice($s) {
 function info($s) {
 	$a = get_app();
 
-	if (local_user() AND get_pconfig(local_user(), 'system', 'ignore_info')) {
+	if (local_user() && get_pconfig(local_user(), 'system', 'ignore_info')) {
 		return;
 	}
 
@@ -1063,7 +1063,7 @@ function proc_run($cmd) {
 	$arr = array('args' => $args, 'run_cmd' => true);
 
 	call_hooks("proc_run", $arr);
-	if (!$arr['run_cmd'] OR ! count($args)) {
+	if (!$arr['run_cmd'] || ! count($args)) {
 		return;
 	}
 
@@ -1407,7 +1407,7 @@ function clear_cache($basepath = "", $path = "") {
 		$path = $basepath;
 	}
 
-	if (($path == "") OR (!is_dir($path))) {
+	if (($path == "") || (!is_dir($path))) {
 		return;
 	}
 
@@ -1444,7 +1444,7 @@ function get_itemcachepath() {
 	}
 
 	$itemcache = get_config('system', 'itemcache');
-	if (($itemcache != "") AND App::directory_usable($itemcache)) {
+	if (($itemcache != "") && App::directory_usable($itemcache)) {
 		return $itemcache;
 	}
 
@@ -1471,7 +1471,7 @@ function get_itemcachepath() {
  */
 function get_spoolpath() {
 	$spoolpath = get_config('system', 'spoolpath');
-	if (($spoolpath != "") AND App::directory_usable($spoolpath)) {
+	if (($spoolpath != "") && App::directory_usable($spoolpath)) {
 		// We have a spool path and it is usable
 		return $spoolpath;
 	}
@@ -1506,7 +1506,7 @@ function get_temppath() {
 
 	$temppath = get_config("system", "temppath");
 
-	if (($temppath != "") AND App::directory_usable($temppath)) {
+	if (($temppath != "") && App::directory_usable($temppath)) {
 		// We have a temp path and it is usable
 		return $temppath;
 	}
@@ -1515,7 +1515,7 @@ function get_temppath() {
 	$temppath = sys_get_temp_dir();
 
 	// Check if it is usable
-	if (($temppath != "") AND App::directory_usable($temppath)) {
+	if (($temppath != "") && App::directory_usable($temppath)) {
 		// To avoid any interferences with other systems we create our own directory
 		$new_temppath = $temppath . "/" . $a->get_hostname();
 		if (!is_dir($new_temppath)) {
@@ -1638,7 +1638,7 @@ function argv($x) {
 function infinite_scroll_data($module) {
 
 	if (get_pconfig(local_user(), 'system', 'infinite_scroll')
-		AND ($module == "network") AND ($_GET["mode"] != "minimal")) {
+		&& ($module == "network") && ($_GET["mode"] != "minimal")) {
 
 		// get the page number
 		if (is_string($_GET["page"])) {
@@ -1651,12 +1651,12 @@ function infinite_scroll_data($module) {
 
 		// try to get the uri from which we load the content
 		foreach ($_GET AS $param => $value) {
-			if (($param != "page") AND ($param != "q")) {
+			if (($param != "page") && ($param != "q")) {
 				$reload_uri .= "&" . $param . "=" . urlencode($value);
 			}
 		}
 
-		if (($a->page_offset != "") AND ! strstr($reload_uri, "&offset=")) {
+		if (($a->page_offset != "") && ! strstr($reload_uri, "&offset=")) {
 			$reload_uri .= "&offset=" . urlencode($a->page_offset);
 		}
 
diff --git a/include/Contact.php b/include/Contact.php
index bb6d8c1981..0aeabc9725 100644
--- a/include/Contact.php
+++ b/include/Contact.php
@@ -262,33 +262,33 @@ function get_contact_details_by_url($url, $uid = -1, $default = array()) {
 		$profile = $default;
 	}
 
-	if (($profile["photo"] == "") AND isset($default["photo"])) {
+	if (($profile["photo"] == "") && isset($default["photo"])) {
 		$profile["photo"] = $default["photo"];
 	}
 
-	if (($profile["name"] == "") AND isset($default["name"])) {
+	if (($profile["name"] == "") && isset($default["name"])) {
 		$profile["name"] = $default["name"];
 	}
 
-	if (($profile["network"] == "") AND isset($default["network"])) {
+	if (($profile["network"] == "") && isset($default["network"])) {
 		$profile["network"] = $default["network"];
 	}
 
-	if (($profile["thumb"] == "") AND isset($profile["photo"])) {
+	if (($profile["thumb"] == "") && isset($profile["photo"])) {
 		$profile["thumb"] = $profile["photo"];
 	}
 
-	if (($profile["micro"] == "") AND isset($profile["thumb"])) {
+	if (($profile["micro"] == "") && isset($profile["thumb"])) {
 		$profile["micro"] = $profile["thumb"];
 	}
 
-	if ((($profile["addr"] == "") OR ($profile["name"] == "")) AND ($profile["gid"] != 0) AND
+	if ((($profile["addr"] == "") || ($profile["name"] == "")) && ($profile["gid"] != 0) &&
 		in_array($profile["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS))) {
 		proc_run(PRIORITY_LOW, "include/update_gcontact.php", $profile["gid"]);
 	}
 
 	// Show contact details of Diaspora contacts only if connected
-	if (($profile["cid"] == 0) AND ($profile["network"] == NETWORK_DIASPORA)) {
+	if (($profile["cid"] == 0) && ($profile["network"] == NETWORK_DIASPORA)) {
 		$profile["location"] = "";
 		$profile["about"] = "";
 		$profile["gender"] = "";
@@ -559,7 +559,7 @@ function get_contact($url, $uid = 0, $no_update = false) {
 		// Update the contact every 7 days
 		$update_photo = ($contacts[0]['avatar-date'] < datetime_convert('','','now -7 days'));
 
-		if (!$update_photo OR $no_update) {
+		if (!$update_photo || $no_update) {
 			return $contact_id;
 		}
 	} elseif ($uid != 0) {
@@ -636,7 +636,7 @@ function get_contact($url, $uid = 0, $no_update = false) {
 		}
 	}
 
-	if (count($contacts) > 1 AND $uid == 0 AND $contact_id != 0 AND $url != "") {
+	if (count($contacts) > 1 && $uid == 0 && $contact_id != 0 && $url != "") {
 		q("DELETE FROM `contact` WHERE `nurl` = '%s' AND `id` != %d AND NOT `self`",
 			dbesc(normalise_link($url)),
 			intval($contact_id));
@@ -654,9 +654,9 @@ function get_contact($url, $uid = 0, $no_update = false) {
 	}
 
 	// Only update if there had something been changed
-	if ($data["addr"] != $contacts[0]["addr"] OR
-		$data["alias"] != $contacts[0]["alias"] OR
-		$data["name"] != $contacts[0]["name"] OR
+	if ($data["addr"] != $contacts[0]["addr"] ||
+		$data["alias"] != $contacts[0]["alias"] ||
+		$data["name"] != $contacts[0]["name"] ||
 		$data["nick"] != $contacts[0]["nick"]) {
 		q("UPDATE `contact` SET `addr` = '%s', `alias` = '%s', `name` = '%s', `nick` = '%s',
 			`name-date` = '%s', `uri-date` = '%s' WHERE `id` = %d",
@@ -769,7 +769,7 @@ function formatted_location($profile) {
 	if($profile['locality'])
 		$location .= $profile['locality'];
 
-	if($profile['region'] AND ($profile['locality'] != $profile['region'])) {
+	if($profile['region'] && ($profile['locality'] != $profile['region'])) {
 		if($location)
 			$location .= ', ';
 
diff --git a/include/Photo.php b/include/Photo.php
index 5920f80b38..5c3a52ffd5 100644
--- a/include/Photo.php
+++ b/include/Photo.php
@@ -785,7 +785,7 @@ function update_contact_avatar($avatar, $uid, $cid, $force = false) {
 		$data = array($r[0]["photo"], $r[0]["thumb"], $r[0]["micro"]);
 	}
 
-	if (($r[0]["avatar"] != $avatar) OR $force) {
+	if (($r[0]["avatar"] != $avatar) || $force) {
 		$photos = import_profile_photo($avatar, $uid, $cid, true);
 
 		if ($photos) {
@@ -825,7 +825,7 @@ function import_profile_photo($photo, $uid, $cid, $quit_on_error = false) {
 	$filename = basename($photo);
 	$img_str = fetch_url($photo, true);
 
-	if ($quit_on_error AND ($img_str == "")) {
+	if ($quit_on_error && ($img_str == "")) {
 		return false;
 	}
 
@@ -883,7 +883,7 @@ function import_profile_photo($photo, $uid, $cid, $quit_on_error = false) {
 		$photo_failure = true;
 	}
 
-	if ($photo_failure AND $quit_on_error) {
+	if ($photo_failure && $quit_on_error) {
 		return false;
 	}
 
@@ -902,7 +902,7 @@ function get_photo_info($url) {
 
 	$data = Cache::get($url);
 
-	if (is_null($data) OR !$data OR !is_array($data)) {
+	if (is_null($data) || !$data || !is_array($data)) {
 		$img_str = fetch_url($url, true, $redirects, 4);
 		$filesize = strlen($img_str);
 
@@ -996,7 +996,7 @@ function store_photo(App $a, $uid, $imagedata = "", $url = "") {
 	/// $default_cid      = $r[0]['id'];
 	/// $community_page   = (($r[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);
 
-	if ((strlen($imagedata) == 0) AND ($url == "")) {
+	if ((strlen($imagedata) == 0) && ($url == "")) {
 		logger("No image data and no url provided", LOGGER_DEBUG);
 		return(array());
 	} elseif (strlen($imagedata) == 0) {
@@ -1102,7 +1102,7 @@ function store_photo(App $a, $uid, $imagedata = "", $url = "") {
 		}
 	}
 
-	if ($width > 160 AND $height > 160) {
+	if ($width > 160 && $height > 160) {
 		$x = 0;
 		$y = 0;
 
diff --git a/include/acl_selectors.php b/include/acl_selectors.php
index c7c6bb206a..665ed17bdf 100644
--- a/include/acl_selectors.php
+++ b/include/acl_selectors.php
@@ -209,7 +209,7 @@ function contact_select($selname, $selclass, $preselected = false, $size = 4, $p
 
 	$tabindex = ($tabindex > 0 ? "tabindex=\"$tabindex\"" : "");
 
-	if ($privmail AND $preselected) {
+	if ($privmail && $preselected) {
 		$sql_extra .= " AND `id` IN (".implode(",", $preselected).")";
 		$hidepreselected = ' style="display: none;"';
 	} else {
@@ -261,7 +261,7 @@ function contact_select($selname, $selclass, $preselected = false, $size = 4, $p
 
 	$o .= "</select>\r\n";
 
-	if ($privmail AND $preselected) {
+	if ($privmail && $preselected) {
 		$o .= implode(", ", $receiverlist);
 	}
 
diff --git a/include/api.php b/include/api.php
index 5d962ecd03..bc40e420b0 100644
--- a/include/api.php
+++ b/include/api.php
@@ -483,7 +483,7 @@ $called_api = null;
 		logger("api_get_user: Fetching user data for user ".$contact_id, LOGGER_DEBUG);
 
 		// Searching for contact URL
-		if (!is_null($contact_id) AND (intval($contact_id) == 0)) {
+		if (!is_null($contact_id) && (intval($contact_id) == 0)) {
 			$user = dbesc(normalise_link($contact_id));
 			$url = $user;
 			$extra_query = "AND `contact`.`nurl` = '%s' ";
@@ -493,7 +493,7 @@ $called_api = null;
 		}
 
 		// Searching for contact id with uid = 0
-		if (!is_null($contact_id) AND (intval($contact_id) != 0)) {
+		if (!is_null($contact_id) && (intval($contact_id) != 0)) {
 			$user = dbesc(api_unique_id_to_url($contact_id));
 
 			if ($user == "") {
@@ -538,7 +538,7 @@ $called_api = null;
 			}
 		}
 
-		if (is_null($user) AND ($a->argc > (count($called_api) - 1)) AND (count($called_api) > 0)) {
+		if (is_null($user) && ($a->argc > (count($called_api) - 1)) && (count($called_api) > 0)) {
 			$argid = count($called_api);
 			list($user, $null) = explode(".", $a->argv[$argid]);
 			if (is_numeric($user)) {
@@ -600,7 +600,7 @@ $called_api = null;
 				$network_name = network_to_name($r[0]['network'], $r[0]['url']);
 
 				// If no nick where given, extract it from the address
-				if (($r[0]['nick'] == "") OR ($r[0]['name'] == $r[0]['nick'])) {
+				if (($r[0]['nick'] == "") || ($r[0]['name'] == $r[0]['nick'])) {
 					$r[0]['nick'] = api_get_nick($r[0]["url"]);
 				}
 
@@ -716,7 +716,7 @@ $called_api = null;
 		$starred = 0;
 
 		// Add a nick if it isn't present there
-		if (($uinfo[0]['nick'] == "") OR ($uinfo[0]['name'] == $uinfo[0]['nick'])) {
+		if (($uinfo[0]['nick'] == "") || ($uinfo[0]['name'] == $uinfo[0]['nick'])) {
 			$uinfo[0]['nick'] = api_get_nick($uinfo[0]["url"]);
 		}
 
@@ -749,7 +749,7 @@ $called_api = null;
 			'contributors_enabled' => false,
 			'is_translator' => false,
 			'is_translation_enabled' => false,
-			'following' => (($uinfo[0]['rel'] == CONTACT_IS_FOLLOWER) OR ($uinfo[0]['rel'] == CONTACT_IS_FRIEND)),
+			'following' => (($uinfo[0]['rel'] == CONTACT_IS_FOLLOWER) || ($uinfo[0]['rel'] == CONTACT_IS_FRIEND)),
 			'follow_request_sent' => false,
 			'statusnet_blocking' => false,
 			'notifications' => false,
@@ -777,10 +777,10 @@ $called_api = null;
 
 		$status_user = api_get_user($a, $item["author-link"]);
 
-		$status_user["protected"] = (($item["allow_cid"] != "") OR
-						($item["allow_gid"] != "") OR
-						($item["deny_cid"] != "") OR
-						($item["deny_gid"] != "") OR
+		$status_user["protected"] = (($item["allow_cid"] != "") ||
+						($item["allow_gid"] != "") ||
+						($item["deny_cid"] != "") ||
+						($item["deny_gid"] != "") ||
 						$item["private"]);
 
 		if ($item['thr-parent'] == $item['uri']) {
@@ -1305,9 +1305,9 @@ $called_api = null;
 				$status_info["entities"] = $converted["entities"];
 			}
 
-			if (($lastwall['item_network'] != "") AND ($status["source"] == 'web')) {
+			if (($lastwall['item_network'] != "") && ($status["source"] == 'web')) {
 				$status_info["source"] = network_to_name($lastwall['item_network'], $user_info['url']);
-			} elseif (($lastwall['item_network'] != "") AND (network_to_name($lastwall['item_network'], $user_info['url']) != $status_info["source"])) {
+			} elseif (($lastwall['item_network'] != "") && (network_to_name($lastwall['item_network'], $user_info['url']) != $status_info["source"])) {
 				$status_info["source"] = trim($status_info["source"].' ('.network_to_name($lastwall['item_network'], $user_info['url']).')');
 			}
 
@@ -1393,11 +1393,11 @@ $called_api = null;
 				$user_info["status"]["entities"] = $converted["entities"];
 			}
 
-			if (($lastwall['item_network'] != "") AND ($user_info["status"]["source"] == 'web')) {
+			if (($lastwall['item_network'] != "") && ($user_info["status"]["source"] == 'web')) {
 				$user_info["status"]["source"] = network_to_name($lastwall['item_network'], $user_info['url']);
 			}
 
-			if (($lastwall['item_network'] != "") AND (network_to_name($lastwall['item_network'], $user_info['url']) != $user_info["status"]["source"])) {
+			if (($lastwall['item_network'] != "") && (network_to_name($lastwall['item_network'], $user_info['url']) != $user_info["status"]["source"])) {
 				$user_info["status"]["source"] = trim($user_info["status"]["source"] . ' (' . network_to_name($lastwall['item_network'], $user_info['url']) . ')');
 			}
 
@@ -2289,11 +2289,11 @@ $called_api = null;
 			$statushtml = "<h4>" . bbcode($item['title']) . "</h4>\n" . $statushtml;
 		}
 
-		// feeds without body should contain the link 
-		if (($item['network'] == NETWORK_FEED) && (strlen($item['body']) == 0)) { 
-			$statushtml .= bbcode($item['plink']); 
-		} 
-		
+		// feeds without body should contain the link
+		if (($item['network'] == NETWORK_FEED) && (strlen($item['body']) == 0)) {
+			$statushtml .= bbcode($item['plink']);
+		}
+
 		$entities = api_get_entitities($statustext, $body);
 
 		return array(
@@ -2402,8 +2402,8 @@ $called_api = null;
 		$offset = 0;
 		//foreach ($urls[1] AS $id=>$url) {
 		foreach ($ordered_urls AS $url) {
-			if ((substr($url["title"], 0, 7) != "http://") AND (substr($url["title"], 0, 8) != "https://") AND
-				!strpos($url["title"], "http://") AND !strpos($url["title"], "https://"))
+			if ((substr($url["title"], 0, 7) != "http://") && (substr($url["title"], 0, 8) != "https://") &&
+				!strpos($url["title"], "http://") && !strpos($url["title"], "https://"))
 				$display_url = $url["title"];
 			else {
 				$display_url = str_replace(array("http://www.", "https://www."), array("", ""), $url["url"]);
@@ -2455,7 +2455,7 @@ $called_api = null;
 						$scale = scale_image($image[0], $image[1], 150);
 						$sizes["thumb"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");
 
-						if (($image[0] > 150) OR ($image[1] > 150)) {
+						if (($image[0] > 150) || ($image[1] > 150)) {
 							$scale = scale_image($image[0], $image[1], 340);
 							$sizes["small"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");
 						}
@@ -2463,7 +2463,7 @@ $called_api = null;
 						$scale = scale_image($image[0], $image[1], 600);
 						$sizes["medium"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");
 
-						if (($image[0] > 600) OR ($image[1] > 600)) {
+						if (($image[0] > 600) || ($image[1] > 600)) {
 							$scale = scale_image($image[0], $image[1], 1024);
 							$sizes["large"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");
 						}
@@ -2668,7 +2668,7 @@ $called_api = null;
 			list($status_user, $owner_user) = api_item_get_user($a, $item);
 
 			// Look if the posts are matching if they should be filtered by user id
-			if ($filter_user AND ($status_user["id"] != $user_info["id"])) {
+			if ($filter_user && ($status_user["id"] != $user_info["id"])) {
 				continue;
 			}
 
@@ -2712,9 +2712,9 @@ $called_api = null;
 				$status["entities"] = $converted["entities"];
 			}
 
-			if (($item['item_network'] != "") AND ($status["source"] == 'web')) {
+			if (($item['item_network'] != "") && ($status["source"] == 'web')) {
 				$status["source"] = network_to_name($item['item_network'], $user_info['url']);
-			} elseif (($item['item_network'] != "") AND (network_to_name($item['item_network'], $user_info['url']) != $status["source"])) {
+			} elseif (($item['item_network'] != "") && (network_to_name($item['item_network'], $user_info['url']) != $status["source"])) {
 				$status["source"] = trim($status["source"].' ('.network_to_name($item['item_network'], $user_info['url']).')');
 			}
 
@@ -2723,7 +2723,7 @@ $called_api = null;
 			// It doesn't work reliable with the link if its a feed
 			//$IsRetweet = ($item['owner-link'] != $item['author-link']);
 			//if ($IsRetweet)
-			//	$IsRetweet = (($item['owner-name'] != $item['author-name']) OR ($item['owner-avatar'] != $item['author-avatar']));
+			//	$IsRetweet = (($item['owner-name'] != $item['author-name']) || ($item['owner-avatar'] != $item['author-avatar']));
 
 
 			if ($item["id"] == $item["parent"]) {
@@ -3022,7 +3022,7 @@ $called_api = null;
 
 		if (api_user() === false) throw new ForbiddenException();
 
-		if (!x($_POST, "text") OR (!x($_POST,"screen_name") AND !x($_POST,"user_id"))) return;
+		if (!x($_POST, "text") || (!x($_POST,"screen_name") && !x($_POST,"user_id"))) return;
 
 		$sender = api_get_user($a);
 
@@ -4334,7 +4334,7 @@ $called_api = null;
 		$in_reply_to['user_id_str'] = NULL;
 		$in_reply_to['screen_name'] = NULL;
 
-		if (($item['thr-parent'] != $item['uri']) AND (intval($item['parent']) != intval($item['id']))) {
+		if (($item['thr-parent'] != $item['uri']) && (intval($item['parent']) != intval($item['id']))) {
 			$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' LIMIT 1",
 				intval($item['uid']),
 				dbesc($item['thr-parent']));
@@ -4415,7 +4415,7 @@ $called_api = null;
 		if (isset($data["text"]))
 			$body = $data["text"];
 
-		if (($body == "") AND (isset($data["title"])))
+		if (($body == "") && (isset($data["title"])))
 			$body = $data["title"];
 
 		if (isset($data["url"]))
diff --git a/include/auth.php b/include/auth.php
index 5dfe9d3e06..d301f87055 100644
--- a/include/auth.php
+++ b/include/auth.php
@@ -29,7 +29,7 @@ if (isset($_COOKIE["Friendica"])) {
 			new_cookie($authcookiedays*24*60*60, $r[0]);
 
 			// Do the authentification if not done by now
-			if (!isset($_SESSION) OR !isset($_SESSION['authenticated'])) {
+			if (!isset($_SESSION) || !isset($_SESSION['authenticated'])) {
 				authenticate_success($r[0]);
 
 				if (get_config('system','paranoia'))
diff --git a/include/bbcode.php b/include/bbcode.php
index 9a43cdb305..2b2d7fc937 100644
--- a/include/bbcode.php
+++ b/include/bbcode.php
@@ -49,14 +49,14 @@ function bb_attachment($Text, $simplehtml = false, $tryoembed = true) {
 		$data["title"] = str_replace(array("http://", "https://"), "", $data["title"]);
 	}
 
-	if (((strpos($data["text"], "[img=") !== false) OR (strpos($data["text"], "[img]") !== false)) AND ($data["image"] != "")) {
+	if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false)) && ($data["image"] != "")) {
 		$data["preview"] = $data["image"];
 		$data["image"] = "";
 	}
 
 	if ($simplehtml == 7) {
 		$text = style_url_for_mastodon($data["url"]);
-	} elseif (($simplehtml != 4) AND ($simplehtml != 0)) {
+	} elseif (($simplehtml != 4) && ($simplehtml != 0)) {
 		$text = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
 	} else {
 		$text = sprintf('<span class="type-%s">', $data["type"]);
@@ -71,13 +71,13 @@ function bb_attachment($Text, $simplehtml = false, $tryoembed = true) {
 		if (strstr(strtolower($oembed), "<iframe ")) {
 			$text = $oembed;
 		} else {
-			if (($data["image"] != "") AND !strstr(strtolower($oembed), "<img ")) {
+			if (($data["image"] != "") && !strstr(strtolower($oembed), "<img ")) {
 				$text .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], proxy_url($data["image"]), $data["title"]);
-			} elseif (($data["preview"] != "") AND !strstr(strtolower($oembed), "<img ")) {
+			} elseif (($data["preview"] != "") && !strstr(strtolower($oembed), "<img ")) {
 				$text .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], proxy_url($data["preview"]), $data["title"]);
 			}
 
-			if (($data["type"] == "photo") AND ($data["url"] != "") AND ($data["image"] != "")) {
+			if (($data["type"] == "photo") && ($data["url"] != "") && ($data["image"] != "")) {
 				$text .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a>', $data["url"], proxy_url($data["image"]), $data["title"]);
 			} else {
 				$text .= $oembed;
@@ -103,25 +103,25 @@ function bb_remove_share_information($Text, $plaintext = false, $nolink = false)
 
 	$title = htmlentities($data["title"], ENT_QUOTES, 'UTF-8', false);
 	$text = htmlentities($data["text"], ENT_QUOTES, 'UTF-8', false);
-	if ($plaintext OR (($title != "") AND strstr($text, $title))) {
+	if ($plaintext || (($title != "") && strstr($text, $title))) {
 		$data["title"] = $data["url"];
-	} elseif (($text != "") AND strstr($title, $text)) {
+	} elseif (($text != "") && strstr($title, $text)) {
 		$data["text"] = $data["title"];
 		$data["title"] = $data["url"];
 	}
 
-	if (($data["text"] == "") AND ($data["title"] != "") AND ($data["url"] == "")) {
+	if (($data["text"] == "") && ($data["title"] != "") && ($data["url"] == "")) {
 		return $data["title"] . $data["after"];
 	}
 
 	// If the link already is included in the post, don't add it again
-	if (($data["url"] != "") AND strpos($data["text"], $data["url"])) {
+	if (($data["url"] != "") && strpos($data["text"], $data["url"])) {
 		return $data["text"] . $data["after"];
 	}
 
 	$text = $data["text"];
 
-	if (($data["url"] != "") AND ($data["title"] != "")) {
+	if (($data["url"] != "") && ($data["title"] != "")) {
 		$text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
 	} elseif (($data["url"] != "")) {
 		$text .= "\n" . $data["url"];
@@ -167,7 +167,7 @@ function cleancss($input) {
 function bb_style_url($match) {
         $url = $match[1];
 
-	if (isset($match[2]) AND ($match[1] != $match[2])) {
+	if (isset($match[2]) && ($match[1] != $match[2])) {
 		return $match[0];
 	}
 
@@ -485,20 +485,20 @@ function bb_ShareAttributes($share, $simplehtml) {
 
 	$data = get_contact_details_by_url($profile);
 
-	if (isset($data["name"]) AND ($data["name"] != "") AND isset($data["addr"]) AND ($data["addr"] != ""))
+	if (isset($data["name"]) && ($data["name"] != "") && isset($data["addr"]) && ($data["addr"] != ""))
 	        $userid_compact = $data["name"]." (".$data["addr"].")";
 	else
 		$userid_compact = GetProfileUsername($profile,$author, true);
 
-	if (isset($data["addr"]) AND ($data["addr"] != ""))
+	if (isset($data["addr"]) && ($data["addr"] != ""))
 		$userid = $data["addr"];
 	else
 		$userid = GetProfileUsername($profile,$author, false);
 
-	if (isset($data["name"]) AND ($data["name"] != ""))
+	if (isset($data["name"]) && ($data["name"] != ""))
 		$author = $data["name"];
 
-	if (isset($data["micro"]) AND ($data["micro"] != ""))
+	if (isset($data["micro"]) && ($data["micro"] != ""))
 		$avatar = $data["micro"];
 
 	$preshare = trim($share[1]);
@@ -744,7 +744,7 @@ function bb_RemovePictureLinks($match) {
 }
 
 function bb_expand_links($match) {
-	if (($match[3] == "") OR ($match[2] == $match[3]) OR stristr($match[2], $match[3])) {
+	if (($match[3] == "") || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
 		return ($match[1] . "[url]" . $match[2] . "[/url]");
 	} else {
 		return ($match[1] . $match[3] . " [url]" . $match[2] . "[/url]");
@@ -930,7 +930,7 @@ function bbcode($Text, $preserve_nl = false, $tryoembed = true, $simplehtml = fa
 	$MAILSearchString = $URLSearchString;
 
 	// Remove all hashtag addresses
-	if ((!$tryoembed OR $simplehtml) AND !in_array($simplehtml, array(3, 7))) {
+	if ((!$tryoembed || $simplehtml) && !in_array($simplehtml, array(3, 7))) {
 		$Text = preg_replace("/([#@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $Text);
 	} elseif ($simplehtml == 3) {
 		$Text = preg_replace("/([@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
@@ -1319,7 +1319,7 @@ function bbcode($Text, $preserve_nl = false, $tryoembed = true, $simplehtml = fa
 	// Clean up the HTML by loading and saving the HTML with the DOM.
 	// Bad structured html can break a whole page.
 	// For performance reasons do it only with ativated item cache or at export.
-	if (!$tryoembed OR (get_itemcachepath() != "")) {
+	if (!$tryoembed || (get_itemcachepath() != "")) {
 		$doc = new DOMDocument();
 		$doc->preserveWhiteSpace = false;
 
diff --git a/include/cache.php b/include/cache.php
index b56906c544..d3b24c19e7 100644
--- a/include/cache.php
+++ b/include/cache.php
@@ -172,35 +172,35 @@ class Cache {
 			set_config("system", "cache_cleared_day", time());
 		}
 
-		if (($max_level <= CACHE_HOUR) AND (get_config("system", "cache_cleared_hour")) < time() - self::duration(CACHE_HOUR)) {
+		if (($max_level <= CACHE_HOUR) && (get_config("system", "cache_cleared_hour")) < time() - self::duration(CACHE_HOUR)) {
 			q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
 				dbesc(datetime_convert('UTC','UTC',"now - 1 hours")), intval(CACHE_HOUR));
 
 			set_config("system", "cache_cleared_hour", time());
 		}
 
-		if (($max_level <= CACHE_HALF_HOUR) AND (get_config("system", "cache_cleared_half_hour")) < time() - self::duration(CACHE_HALF_HOUR)) {
+		if (($max_level <= CACHE_HALF_HOUR) && (get_config("system", "cache_cleared_half_hour")) < time() - self::duration(CACHE_HALF_HOUR)) {
 			q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
 				dbesc(datetime_convert('UTC','UTC',"now - 30 minutes")), intval(CACHE_HALF_HOUR));
 
 			set_config("system", "cache_cleared_half_hour", time());
 		}
 
-		if (($max_level <= CACHE_QUARTER_HOUR) AND (get_config("system", "cache_cleared_quarter_hour")) < time() - self::duration(CACHE_QUARTER_HOUR)) {
+		if (($max_level <= CACHE_QUARTER_HOUR) && (get_config("system", "cache_cleared_quarter_hour")) < time() - self::duration(CACHE_QUARTER_HOUR)) {
 			q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
 				dbesc(datetime_convert('UTC','UTC',"now - 15 minutes")), intval(CACHE_QUARTER_HOUR));
 
 			set_config("system", "cache_cleared_quarter_hour", time());
 		}
 
-		if (($max_level <= CACHE_FIVE_MINUTES) AND (get_config("system", "cache_cleared_five_minute")) < time() - self::duration(CACHE_FIVE_MINUTES)) {
+		if (($max_level <= CACHE_FIVE_MINUTES) && (get_config("system", "cache_cleared_five_minute")) < time() - self::duration(CACHE_FIVE_MINUTES)) {
 			q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
 				dbesc(datetime_convert('UTC','UTC',"now - 5 minutes")), intval(CACHE_FIVE_MINUTES));
 
 			set_config("system", "cache_cleared_five_minute", time());
 		}
 
-		if (($max_level <= CACHE_MINUTE) AND (get_config("system", "cache_cleared_minute")) < time() - self::duration(CACHE_MINUTE)) {
+		if (($max_level <= CACHE_MINUTE) && (get_config("system", "cache_cleared_minute")) < time() - self::duration(CACHE_MINUTE)) {
 			q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
 				dbesc(datetime_convert('UTC','UTC',"now - 1 minutes")), intval(CACHE_MINUTE));
 
diff --git a/include/contact_selectors.php b/include/contact_selectors.php
index 7069af0664..27bdb47570 100644
--- a/include/contact_selectors.php
+++ b/include/contact_selectors.php
@@ -100,7 +100,7 @@ function network_to_name($s, $profile = "") {
 
 	$networkname = str_replace($search, $replace, $s);
 
-	if ((in_array($s, array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS))) AND ($profile != "")) {
+	if ((in_array($s, array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS))) && ($profile != "")) {
 		$r = q("SELECT `gserver`.`platform` FROM `gcontact`
 				INNER JOIN `gserver` ON `gserver`.`nurl` = `gcontact`.`server_url`
 				WHERE `gcontact`.`nurl` = '%s' AND `platform` != ''",
diff --git a/include/contact_widgets.php b/include/contact_widgets.php
index db077b420f..3cd18c7792 100644
--- a/include/contact_widgets.php
+++ b/include/contact_widgets.php
@@ -51,7 +51,7 @@ function unavailable_networks() {
 		$networks[] = NETWORK_APPNET;
 	}
 
-	if (!plugin_enabled("fbpost") AND !plugin_enabled("facebook")) {
+	if (!plugin_enabled("fbpost") && !plugin_enabled("facebook")) {
 		$networks[] = NETWORK_FACEBOOK;
 	}
 
diff --git a/include/conversation.php b/include/conversation.php
index 27f9578ed8..e58df19f16 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -712,7 +712,7 @@ function conversation(App $a, $items, $mode, $update, $preview = false) {
 					$profile_link = zrl($profile_link);
 				}
 
-				if (!x($item, 'author-thumb') OR ($item['author-thumb'] == "")) {
+				if (!x($item, 'author-thumb') || ($item['author-thumb'] == "")) {
 					$author_contact = get_contact_details_by_url($item['author-link'], $profile_owner);
 					if ($author_contact["thumb"]) {
 						$item['author-thumb'] = $author_contact["thumb"];
@@ -721,7 +721,7 @@ function conversation(App $a, $items, $mode, $update, $preview = false) {
 					}
 				}
 
-				if (!isset($item['owner-thumb']) OR ($item['owner-thumb'] == "")) {
+				if (!isset($item['owner-thumb']) || ($item['owner-thumb'] == "")) {
 					$owner_contact = get_contact_details_by_url($item['owner-link'], $profile_owner);
 					if ($owner_contact["thumb"]) {
 						$item['owner-thumb'] = $owner_contact["thumb"];
@@ -1013,7 +1013,7 @@ function item_photo_menu($item) {
 			$menu[t("Poke")] = $poke_link;
 		}
 
-		if ((($cid == 0) OR ($rel == CONTACT_IS_FOLLOWER)) AND
+		if ((($cid == 0) || ($rel == CONTACT_IS_FOLLOWER)) &&
 			in_array($item['network'], array(NETWORK_DFRN, NETWORK_OSTATUS, NETWORK_DIASPORA))) {
 			$menu[t('Connect/Follow')] = 'follow?url=' . urlencode($item['author-link']);
 		}
diff --git a/include/cron.php b/include/cron.php
index 70b87e9696..76f3e41019 100644
--- a/include/cron.php
+++ b/include/cron.php
@@ -186,7 +186,7 @@ function cron_poll_contacts($argc, $argv) {
 				$contact['priority'] = 2;
 			}
 
-			if ($contact['subhub'] AND in_array($contact['network'], array(NETWORK_DFRN, NETWORK_ZOT, NETWORK_OSTATUS))) {
+			if ($contact['subhub'] && in_array($contact['network'], array(NETWORK_DFRN, NETWORK_ZOT, NETWORK_OSTATUS))) {
 				/*
 				 * We should be getting everything via a hub. But just to be sure, let's check once a day.
 				 * (You can make this more or less frequent if desired by setting 'pushpoll_frequency' appropriately)
@@ -197,7 +197,7 @@ function cron_poll_contacts($argc, $argv) {
 				$contact['priority'] = (($poll_interval !== false) ? intval($poll_interval) : 3);
 			}
 
-			if (($contact['priority'] >= 0) AND !$force) {
+			if (($contact['priority'] >= 0) && !$force) {
 				$update = false;
 
 				$t = $contact['last-update'];
@@ -245,7 +245,7 @@ function cron_poll_contacts($argc, $argv) {
 
 			logger("Polling " . $contact["network"] . " " . $contact["id"] . " " . $contact["nick"] . " " . $contact["name"]);
 
-			if (($contact['network'] == NETWORK_FEED) AND ($contact['priority'] <= 3)) {
+			if (($contact['network'] == NETWORK_FEED) && ($contact['priority'] <= 3)) {
 				$priority = PRIORITY_MEDIUM;
 			} else {
 				$priority = PRIORITY_LOW;
diff --git a/include/cronhooks.php b/include/cronhooks.php
index 2c378aa39c..4a852935a0 100644
--- a/include/cronhooks.php
+++ b/include/cronhooks.php
@@ -7,7 +7,7 @@ function cronhooks_run(&$argv, &$argc) {
 
 	require_once 'include/datetime.php';
 
-	if (($argc == 2) AND is_array($a->hooks) AND array_key_exists("cron", $a->hooks)) {
+	if (($argc == 2) && is_array($a->hooks) && array_key_exists("cron", $a->hooks)) {
 		foreach ($a->hooks["cron"] as $hook) {
 			if ($hook[1] == $argv[1]) {
 				logger("Calling cron hook '" . $hook[1] . "'", LOGGER_DEBUG);
@@ -38,7 +38,7 @@ function cronhooks_run(&$argv, &$argc) {
 
 	$d = datetime_convert();
 
-	if (is_array($a->hooks) AND array_key_exists("cron", $a->hooks)) {
+	if (is_array($a->hooks) && array_key_exists("cron", $a->hooks)) {
 		foreach ($a->hooks["cron"] as $hook) {
 			logger("Calling cronhooks for '" . $hook[1] . "'", LOGGER_DEBUG);
 			proc_run(PRIORITY_MEDIUM, "include/cronhooks.php", $hook[1]);
diff --git a/include/dba.php b/include/dba.php
index 1f428bf465..e4846899dc 100644
--- a/include/dba.php
+++ b/include/dba.php
@@ -117,7 +117,7 @@ class dba {
 
 	/**
 	 * @brief Returns the MySQL server version string
-	 * 
+	 *
 	 * This function discriminate between the deprecated mysql API and the current
 	 * object-oriented mysqli API. Example of returned string: 5.5.46-0+deb8u1
 	 *
@@ -183,17 +183,17 @@ class dba {
 
 		foreach ($r AS $row) {
 			if ((intval($a->config["system"]["db_loglimit_index"]) > 0)) {
-				$log = (in_array($row['key'], $watchlist) AND
+				$log = (in_array($row['key'], $watchlist) &&
 					($row['rows'] >= intval($a->config["system"]["db_loglimit_index"])));
 			} else {
 				$log = false;
 			}
 
-			if ((intval($a->config["system"]["db_loglimit_index_high"]) > 0) AND ($row['rows'] >= intval($a->config["system"]["db_loglimit_index_high"]))) {
+			if ((intval($a->config["system"]["db_loglimit_index_high"]) > 0) && ($row['rows'] >= intval($a->config["system"]["db_loglimit_index_high"]))) {
 				$log = true;
 			}
 
-			if (in_array($row['key'], $blacklist) OR ($row['key'] == "")) {
+			if (in_array($row['key'], $blacklist) || ($row['key'] == "")) {
 				$log = false;
 			}
 
@@ -363,7 +363,7 @@ class dba {
 		// PDO doesn't return "true" on successful operations - like mysqli does
 		// Emulate this behaviour by checking if the query returned data and had columns
 		// This should be reliable enough
-		if (($this->driver == 'pdo') AND (count($r) == 0) AND ($columns == 0)) {
+		if (($this->driver == 'pdo') && (count($r) == 0) && ($columns == 0)) {
 			return true;
 		}
 
@@ -490,7 +490,7 @@ class dba {
 	static private function replace_parameters($sql, $args) {
 		$offset = 0;
 		foreach ($args AS $param => $value) {
-			if (is_int($args[$param]) OR is_float($args[$param])) {
+			if (is_int($args[$param]) || is_float($args[$param])) {
 				$replace = intval($args[$param]);
 			} else {
 				$replace = "'".self::$dbo->escape($args[$param])."'";
@@ -520,7 +520,7 @@ class dba {
 		unset($args[0]);
 
 		// When the second function parameter is an array then use this as the parameter array
-		if ((count($args) > 0) AND (is_array($args[1]))) {
+		if ((count($args) > 0) && (is_array($args[1]))) {
 			$params = $args[1];
 		} else {
 			$params = $args;
@@ -533,7 +533,7 @@ class dba {
 			$args[++$i] = $param;
 		}
 
-		if (!self::$dbo OR !self::$dbo->connected) {
+		if (!self::$dbo || !self::$dbo->connected) {
 			return false;
 		}
 
@@ -948,7 +948,7 @@ class dba {
 
 			// When the search field is the relation field, we don't need to fetch the rows
 			// This is useful when the leading record is already deleted in the frontend but the rest is done in the backend
-			if ((count($param) == 1) AND ($field == array_keys($param)[0])) {
+			if ((count($param) == 1) && ($field == array_keys($param)[0])) {
 				foreach ($rel_def AS $rel_table => $rel_fields) {
 					foreach ($rel_fields AS $rel_field) {
 						$retval = self::delete($rel_table, array($rel_field => array_values($param)[0]), true, $callstack);
@@ -1110,7 +1110,7 @@ class dba {
 			}
 		}
 
-		if (!$do_update OR (count($fields) == 0)) {
+		if (!$do_update || (count($fields) == 0)) {
 			return true;
 		}
 
@@ -1190,7 +1190,7 @@ class dba {
 
 		$result = self::p($sql, $condition);
 
-		if (is_bool($result) OR !$single_row) {
+		if (is_bool($result) || !$single_row) {
 			return $result;
 		} else {
 			$row = self::fetch($result);
diff --git a/include/dba_pdo.php b/include/dba_pdo.php
index 63f35739a3..2ad5ab7447 100644
--- a/include/dba_pdo.php
+++ b/include/dba_pdo.php
@@ -190,14 +190,14 @@ class dba {
 		 * regardless of any logging that may or may nor be in effect.
 		 * These usually indicate SQL syntax errors that need to be resolved.
 		 */
-		if (isset($result) AND ($result === false)) {
+		if (isset($result) && ($result === false)) {
 			logger('dba: ' . printable($sql) . ' returned false.' . "\n" . $this->error);
 			if (file_exists('dbfail.out')) {
 				file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . ' returned false' . "\n" . $this->error . "\n", FILE_APPEND);
 			}
 		}
 
-		if (isset($result) AND (($result === true) || ($result === false))) {
+		if (isset($result) && (($result === true) || ($result === false))) {
 			return $result;
 		}
 
diff --git a/include/dbclean.php b/include/dbclean.php
index 8da78d64b5..bc41bead2d 100644
--- a/include/dbclean.php
+++ b/include/dbclean.php
@@ -24,7 +24,7 @@ function dbclean_run(&$argv, &$argc) {
 		for ($i = 1; $i <= 9; $i++) {
 			// Execute the background script for a step when it isn't finished.
 			// Execute step 8 and 9 only when $days is defined.
-			if (!Config::get('system', 'finished-dbclean-'.$i, false) AND (($i < 8) OR ($days > 0))) {
+			if (!Config::get('system', 'finished-dbclean-'.$i, false) && (($i < 8) || ($days > 0))) {
 				proc_run(PRIORITY_LOW, 'include/dbclean.php', $i);
 			}
 		}
@@ -296,7 +296,7 @@ function remove_orphans($stage = 0) {
 	}
 
 	// Call it again if not all entries were purged
-	if (($stage != 0) AND ($count > 0)) {
+	if (($stage != 0) && ($count > 0)) {
 		proc_run(PRIORITY_MEDIUM, 'include/dbclean.php');
 	}
 }
diff --git a/include/dbm.php b/include/dbm.php
index db50dae89c..bda62f34c2 100644
--- a/include/dbm.php
+++ b/include/dbm.php
@@ -76,7 +76,7 @@ class dbm {
 
 		if (is_bool($value)) {
 			$value = ($value ? 'true' : 'false');
-		} elseif (is_float($value) OR is_integer($value)) {
+		} elseif (is_float($value) || is_integer($value)) {
 			$value = (string)$value;
 		} else {
 			 $value = "'".dbesc($value)."'";
diff --git a/include/dbstructure.php b/include/dbstructure.php
index 2dec998a74..b53befbf29 100644
--- a/include/dbstructure.php
+++ b/include/dbstructure.php
@@ -133,7 +133,7 @@ function table_structure($table) {
 			// On utf8mb4 a varchar index can only have a length of 191
 			// The "show index" command sometimes returns this value although this value wasn't added manually.
 			// Because we don't want to add this number to every index, we ignore bigger numbers
-			if (($index["Sub_part"] != "") AND (($index["Sub_part"] < 191) OR ($index["Key_name"] == "PRIMARY"))) {
+			if (($index["Sub_part"] != "") && (($index["Sub_part"] < 191) || ($index["Key_name"] == "PRIMARY"))) {
 				$column .= "(".$index["Sub_part"].")";
 			}
 
@@ -232,7 +232,7 @@ function update_structure($verbose, $action, $tables=null, $definition=null) {
 	}
 
 	// MySQL >= 5.7.4 doesn't support the IGNORE keyword in ALTER TABLE statements
-	if ((version_compare($db->server_info(), '5.7.4') >= 0) AND
+	if ((version_compare($db->server_info(), '5.7.4') >= 0) &&
 		!(strpos($db->server_info(), 'MariaDB') !== false)) {
 		$ignore = '';
 	} else {
@@ -381,7 +381,7 @@ function update_structure($verbose, $action, $tables=null, $definition=null) {
 				$field_definition = $database[$name]["fields"][$fieldname];
 
 				// Define the default collation if not given
-				if (!isset($parameters['Collation']) AND !is_null($field_definition['Collation'])) {
+				if (!isset($parameters['Collation']) && !is_null($field_definition['Collation'])) {
 					$parameters['Collation'] = 'utf8mb4_general_ci';
 				} else {
 					$parameters['Collation'] = null;
@@ -389,7 +389,7 @@ function update_structure($verbose, $action, $tables=null, $definition=null) {
 
 				if ($field_definition['Collation'] != $parameters['Collation']) {
 					$sql2 = db_modify_table_field($fieldname, $parameters);
-					if (($sql3 == "") OR (substr($sql3, -2, 2) == "; ")) {
+					if (($sql3 == "") || (substr($sql3, -2, 2) == "; ")) {
 						$sql3 .= "ALTER" . $ignore . " TABLE `".$temp_name."` ".$sql2;
 					} else {
 						$sql3 .= ", ".$sql2;
@@ -513,7 +513,7 @@ function db_field_command($parameters, $create = true) {
 	if ($parameters["extra"] != "")
 		$fieldstruct .= " ".$parameters["extra"];
 
-	/*if (($parameters["primary"] != "") AND $create)
+	/*if (($parameters["primary"] != "") && $create)
 		$fieldstruct .= " PRIMARY KEY";*/
 
 	return($fieldstruct);
diff --git a/include/delivery.php b/include/delivery.php
index 098e423d17..9e6d8ffe61 100644
--- a/include/delivery.php
+++ b/include/delivery.php
@@ -339,7 +339,7 @@ function delivery_run(&$argv, &$argc){
 
 						// If we are setup as a soapbox we aren't accepting top level posts from this person
 
-						if (($x[0]['page-flags'] == PAGE_SOAPBOX) AND $top_level) {
+						if (($x[0]['page-flags'] == PAGE_SOAPBOX) && $top_level) {
 							break;
 						}
 						logger('mod-delivery: local delivery');
@@ -462,14 +462,14 @@ function delivery_run(&$argv, &$argc){
 								dbesc($it['parent-uri']),
 								intval($uid));
 
-							if (dbm::is_result($r) AND ($r[0]['title'] != '')) {
+							if (dbm::is_result($r) && ($r[0]['title'] != '')) {
 								$subject = $r[0]['title'];
 							} else {
 								$r = q("SELECT `title` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d LIMIT 1",
 									dbesc($it['parent-uri']),
 									intval($uid));
 
-								if (dbm::is_result($r) AND ($r[0]['title'] != ''))
+								if (dbm::is_result($r) && ($r[0]['title'] != ''))
 									$subject = $r[0]['title'];
 							}
 						}
diff --git a/include/dfrn.php b/include/dfrn.php
index 7e4d7af2bc..1b97f39a2d 100644
--- a/include/dfrn.php
+++ b/include/dfrn.php
@@ -245,7 +245,7 @@ class dfrn {
 		/// @TODO This hook can't work anymore
 		//	call_hooks('atom_feed', $atom);
 
-		if (!dbm::is_result($items) OR $onlyheader) {
+		if (!dbm::is_result($items) || $onlyheader) {
 			$atom = trim($doc->saveXML());
 
 			call_hooks('atom_feed_end', $atom);
@@ -508,7 +508,7 @@ class dfrn {
 
 		$attributes = array();
 
-		if (!$public OR !$hidewall) {
+		if (!$public || !$hidewall) {
 			$attributes = array("dfrn:updated" => $namdate);
 		}
 
@@ -519,7 +519,7 @@ class dfrn {
 		$attributes = array("rel" => "photo", "type" => "image/jpeg",
 					"media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 
-		if (!$public OR !$hidewall) {
+		if (!$public || !$hidewall) {
 			$attributes["dfrn:updated"] = $picdate;
 		}
 
@@ -921,7 +921,7 @@ class dfrn {
 
 		if (count($tags)) {
 			foreach ($tags as $t) {
-				if (($type != 'html') OR ($t[0] != "@")) {
+				if (($type != 'html') || ($t[0] != "@")) {
 					xml::add_element($doc, $entry, "category", "", array("scheme" => "X-DFRN:".$t[0].":".$t[1], "term" => $t[2]));
 				}
 			}
@@ -940,7 +940,7 @@ class dfrn {
 				intval($owner["uid"]),
 				dbesc(normalise_link($mention)));
 
-			if (dbm::is_result($r) AND ($r[0]["forum"] OR $r[0]["prv"])) {
+			if (dbm::is_result($r) && ($r[0]["forum"] || $r[0]["prv"])) {
 				xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 											"ostatus:object-type" => ACTIVITY_OBJ_GROUP,
 											"href" => $mention));
@@ -1323,7 +1323,7 @@ class dfrn {
 					$contact["avatar-date"] = $attributes->textContent;
 				}
 			}
-			if (($width > 0) AND ($href != "")) {
+			if (($width > 0) && ($href != "")) {
 				$avatarlist[$width] = $href;
 			}
 		}
@@ -1332,7 +1332,7 @@ class dfrn {
 			$author["avatar"] = current($avatarlist);
 		}
 
-		if (dbm::is_result($r) AND !$onlyfetch) {
+		if (dbm::is_result($r) && !$onlyfetch) {
 			logger("Check if contact details for contact " . $r[0]["id"] . " (" . $r[0]["nick"] . ") have to be updated.", LOGGER_DEBUG);
 
 			$poco = array("url" => $contact["url"]);
@@ -1774,7 +1774,7 @@ class dfrn {
 		$relocate["poll"] = $xpath->query("dfrn:poll/text()", $relocation)->item(0)->nodeValue;
 		$relocate["sitepubkey"] = $xpath->query("dfrn:sitepubkey/text()", $relocation)->item(0)->nodeValue;
 
-		if (($relocate["avatar"] == "") AND ($relocate["photo"] != "")) {
+		if (($relocate["avatar"] == "") && ($relocate["photo"] != "")) {
 			$relocate["avatar"] = $relocate["photo"];
 		}
 
@@ -1922,7 +1922,7 @@ class dfrn {
 		}
 
 		// update last-child if it changes
-		if ($item["last-child"] AND ($item["last-child"] != $current["last-child"])) {
+		if ($item["last-child"] && ($item["last-child"] != $current["last-child"])) {
 			$r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
 				dbesc(datetime_convert()),
 				dbesc($item["parent-uri"]),
@@ -2206,7 +2206,7 @@ class dfrn {
 					$title = $attributes->textContent;
 				}
 			}
-			if (($rel != "") AND ($href != "")) {
+			if (($rel != "") && ($href != "")) {
 				switch ($rel) {
 					case "alternate":
 						$item["plink"] = $href;
@@ -2254,7 +2254,7 @@ class dfrn {
 		);
 
 		// Is there an existing item?
-		if (dbm::is_result($current) AND edited_timestamp_is_newer($current[0], $item) AND
+		if (dbm::is_result($current) && edited_timestamp_is_newer($current[0], $item) &&
 			(datetime_convert("UTC","UTC",$item["edited"]) < $current[0]["edited"])) {
 			logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
 			return;
@@ -2328,7 +2328,7 @@ class dfrn {
 		}
 
 		$notice_info = $xpath->query("statusnet:notice_info", $entry);
-		if ($notice_info AND ($notice_info->length > 0)) {
+		if ($notice_info && ($notice_info->length > 0)) {
 			foreach ($notice_info->item(0)->attributes AS $attributes) {
 				if ($attributes->name == "source") {
 					$item["app"] = strip_tags($attributes->textContent);
@@ -2378,9 +2378,9 @@ class dfrn {
 					}
 				}
 
-				if (($term != "") AND ($scheme != "")) {
+				if (($term != "") && ($scheme != "")) {
 					$parts = explode(":", $scheme);
-					if ((count($parts) >= 4) AND (array_shift($parts) == "X-DFRN")) {
+					if ((count($parts) >= 4) && (array_shift($parts) == "X-DFRN")) {
 						$termhash = array_shift($parts);
 						$termurl = implode(":", $parts);
 
@@ -2440,7 +2440,7 @@ class dfrn {
 				$item["contact-id"] = $owner["contact-id"];
 			}
 
-			if (($item["network"] != $owner["network"]) AND ($owner["network"] != "")) {
+			if (($item["network"] != $owner["network"]) && ($owner["network"] != "")) {
 				$item["network"] = $owner["network"];
 			}
 
@@ -2448,7 +2448,7 @@ class dfrn {
 				$item["contact-id"] = $author["contact-id"];
 			}
 
-			if (($item["network"] != $author["network"]) AND ($author["network"] != "")) {
+			if (($item["network"] != $author["network"]) && ($author["network"] != "")) {
 				$item["network"] = $author["network"];
 			}
 
@@ -2548,7 +2548,7 @@ class dfrn {
 					);
 				}
 
-				if ($posted_id AND $parent AND ($entrytype == DFRN_REPLY_RC)) {
+				if ($posted_id && $parent && ($entrytype == DFRN_REPLY_RC)) {
 					logger("Notifying followers about comment ".$posted_id, LOGGER_DEBUG);
 					proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $posted_id);
 				}
@@ -2613,7 +2613,7 @@ class dfrn {
 			$when = datetime_convert("UTC", "UTC", "now", "Y-m-d H:i:s");
 		}
 
-		if (!$uri OR !$importer["id"]) {
+		if (!$uri || !$importer["id"]) {
 			return false;
 		}
 
diff --git a/include/diaspora.php b/include/diaspora.php
index 25f1aa03b8..62c77f5b2f 100644
--- a/include/diaspora.php
+++ b/include/diaspora.php
@@ -416,7 +416,7 @@ class Diaspora {
 		$fields = $postdata['fields'];
 
 		// Is it a an action (comment, like, ...) for our own post?
-		if (isset($fields->parent_guid) AND !$postdata["relayed"]) {
+		if (isset($fields->parent_guid) && !$postdata["relayed"]) {
 			$guid = notags(unxmlify($fields->parent_guid));
 			$importer = self::importer_for_guid($guid);
 			if (is_array($importer)) {
@@ -612,9 +612,9 @@ class Diaspora {
 				}
 			}
 
-			if (($fieldname == "author_signature") AND ($entry != ""))
+			if (($fieldname == "author_signature") && ($entry != ""))
 				$author_signature = base64_decode($entry);
-			elseif (($fieldname == "parent_author_signature") AND ($entry != ""))
+			elseif (($fieldname == "parent_author_signature") && ($entry != ""))
 				$parent_author_signature = base64_decode($entry);
 			elseif (!in_array($fieldname, array("author_signature", "parent_author_signature", "target_author_signature"))) {
 				if ($signed_data != "") {
@@ -624,7 +624,7 @@ class Diaspora {
 
 				$signed_data .= $entry;
 			}
-			if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) OR
+			if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) ||
 				($orig_type == "relayable_retraction"))
 				xml::copy($entry, $fields, $fieldname);
 		}
@@ -714,13 +714,13 @@ class Diaspora {
 				$update = true;
 		}
 
-		if (!$person OR $update) {
+		if (!$person || $update) {
 			logger("create or refresh", LOGGER_DEBUG);
 			$r = probe_url($handle, PROBE_DIASPORA);
 
 			// Note that Friendica contacts will return a "Diaspora person"
 			// if Diaspora connectivity is enabled on their server
-			if ($r AND ($r["network"] === NETWORK_DIASPORA)) {
+			if ($r && ($r["network"] === NETWORK_DIASPORA)) {
 				self::add_fcontact($r, $update);
 				$person = $r;
 			}
@@ -1143,7 +1143,7 @@ class Diaspora {
 		// Fetch the author - for the old and the new Diaspora version
 		if ($source_xml->post->status_message->diaspora_handle)
 			$author = (string)$source_xml->post->status_message->diaspora_handle;
-		elseif ($source_xml->author AND ($source_xml->getName() == "status_message"))
+		elseif ($source_xml->author && ($source_xml->getName() == "status_message"))
 			$author = (string)$source_xml->author;
 
 		// If this isn't a "status_message" then quit
@@ -1463,7 +1463,7 @@ class Diaspora {
 		}
 
 		// If we are the origin of the parent we store the original data and notify our followers
-		if ($message_id AND $parent_item["origin"]) {
+		if ($message_id && $parent_item["origin"]) {
 
 			// Formerly we stored the signed text, the signature and the author in different fields.
 			// We now store the raw data so that we are more flexible.
@@ -1767,7 +1767,7 @@ class Diaspora {
 		}
 
 		// If we are the origin of the parent we store the original data and notify our followers
-		if ($message_id AND $parent_item["origin"]) {
+		if ($message_id && $parent_item["origin"]) {
 
 			// Formerly we stored the signed text, the signature and the author in different fields.
 			// We now store the raw data so that we are more flexible.
@@ -2116,7 +2116,7 @@ class Diaspora {
 		// perhaps we were already sharing with this person. Now they're sharing with us.
 		// That makes us friends.
 		if ($contact) {
-			if ($following AND $sharing) {
+			if ($following && $sharing) {
 				logger("Author ".$author." (Contact ".$contact["id"].") wants to have a bidirectional conection.", LOGGER_DEBUG);
 				self::receive_request_make_friend($importer, $contact);
 
@@ -2139,17 +2139,17 @@ class Diaspora {
 			}
 		}
 
-		if (!$following AND $sharing AND in_array($importer["page-flags"], array(PAGE_SOAPBOX, PAGE_NORMAL))) {
+		if (!$following && $sharing && in_array($importer["page-flags"], array(PAGE_SOAPBOX, PAGE_NORMAL))) {
 			logger("Author ".$author." wants to share with us - but doesn't want to listen. Request is ignored.", LOGGER_DEBUG);
 			return false;
-		} elseif (!$following AND !$sharing) {
+		} elseif (!$following && !$sharing) {
 			logger("Author ".$author." doesn't want anything - and we don't know the author. Request is ignored.", LOGGER_DEBUG);
 			return false;
-		} elseif (!$following AND $sharing) {
+		} elseif (!$following && $sharing) {
 			logger("Author ".$author." wants to share with us.", LOGGER_DEBUG);
-		} elseif ($following AND $sharing) {
+		} elseif ($following && $sharing) {
 			logger("Author ".$author." wants to have a bidirectional conection.", LOGGER_DEBUG);
-		} elseif ($following AND !$sharing) {
+		} elseif ($following && !$sharing) {
 			logger("Author ".$author." wants to listen to us.", LOGGER_DEBUG);
 		}
 
@@ -2227,9 +2227,9 @@ class Diaspora {
 			// but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
 			// we are going to change the relationship and make them a follower.
 
-			if (($importer["page-flags"] == PAGE_FREELOVE) AND $sharing AND $following)
+			if (($importer["page-flags"] == PAGE_FREELOVE) && $sharing && $following)
 				$new_relation = CONTACT_IS_FRIEND;
-			elseif (($importer["page-flags"] == PAGE_FREELOVE) AND $sharing)
+			elseif (($importer["page-flags"] == PAGE_FREELOVE) && $sharing)
 				$new_relation = CONTACT_IS_SHARING;
 			else
 				$new_relation = CONTACT_IS_FOLLOWER;
@@ -2452,7 +2452,7 @@ class Diaspora {
 			intval($r[0]["parent"]));
 
 		// Only delete it if the parent author really fits
-		if (!link_compare($p[0]["author-link"], $contact["url"]) AND !link_compare($r[0]["author-link"], $contact["url"])) {
+		if (!link_compare($p[0]["author-link"], $contact["url"]) && !link_compare($r[0]["author-link"], $contact["url"])) {
 			logger("Thread author ".$p[0]["author-link"]." and item author ".$r[0]["author-link"]." don't fit to expected contact ".$contact["url"], LOGGER_DEBUG);
 			return false;
 		}
@@ -2489,7 +2489,7 @@ class Diaspora {
 		$target_type = notags(unxmlify($data->target_type));
 
 		$contact = self::contact_by_handle($importer["uid"], $sender);
-		if (!$contact AND (in_array($target_type, array("Contact", "Person")))) {
+		if (!$contact && (in_array($target_type, array("Contact", "Person")))) {
 			logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
 			return false;
 		}
@@ -2617,7 +2617,7 @@ class Diaspora {
 			$datarray["location"] = $address["address"];
 		}
 
-		if (isset($address["lat"]) AND isset($address["lng"])) {
+		if (isset($address["lat"]) && isset($address["lng"])) {
 			$datarray["coord"] = $address["lat"]." ".$address["lng"];
 		}
 
@@ -2930,7 +2930,7 @@ class Diaspora {
 				// The message could not be delivered. We mark the contact as "dead"
 				mark_for_death($contact);
 			}
-		} elseif (($return_code >= 200) AND ($return_code <= 299)) {
+		} elseif (($return_code >= 200) && ($return_code <= 299)) {
 			// We successfully delivered a message, the contact is alive
 			unmark_for_death($contact);
 		}
@@ -3040,7 +3040,7 @@ class Diaspora {
 
 		// Skip if it isn't a pure repeated messages
 		// Does it start with a share?
-		if ((strpos($body, "[share") > 0) AND $complete)
+		if ((strpos($body, "[share") > 0) && $complete)
 			return(false);
 
 		// Does it end with a share?
@@ -3088,7 +3088,7 @@ class Diaspora {
 		$ret= array();
 
 		$ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
-		if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == ""))
+		if (($ret["root_handle"] == $profile) || ($ret["root_handle"] == ""))
 			return(false);
 
 		$link = "";
@@ -3101,7 +3101,7 @@ class Diaspora {
 			$link = $matches[1];
 
 		$ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link);
-		if (($ret["root_guid"] == $link) OR (trim($ret["root_guid"]) == ""))
+		if (($ret["root_guid"] == $link) || (trim($ret["root_guid"]) == ""))
 			return(false);
 
 		return($ret);
@@ -3161,7 +3161,7 @@ class Diaspora {
 		if ($event['start']) {
 			$eventdata['start'] = datetime_convert($eventdata['timezone'], "UTC", $event['start'], $mask);
 		}
-		if ($event['finish'] AND !$event['nofinish']) {
+		if ($event['finish'] && !$event['nofinish']) {
 			$eventdata['end'] = datetime_convert($eventdata['timezone'], "UTC", $event['finish'], $mask);
 		}
 		if ($event['summary']) {
@@ -3207,7 +3207,7 @@ class Diaspora {
 		$created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
 
 		// Detect a share element and do a reshare
-		if (!$item['private'] AND ($ret = self::is_reshare($item["body"]))) {
+		if (!$item['private'] && ($ret = self::is_reshare($item["body"]))) {
 			$message = array("root_diaspora_id" => $ret["root_handle"],
 					"root_guid" => $ret["root_guid"],
 					"guid" => $item["guid"],
@@ -3257,7 +3257,7 @@ class Diaspora {
 					"provider_display_name" => $item["app"]);
 
 			// Diaspora rejects messages when they contain a location without "lat" or "lng"
-			if (!isset($location["lat"]) OR !isset($location["lng"])) {
+			if (!isset($location["lat"]) || !isset($location["lng"])) {
 				unset($message["location"]);
 			}
 
@@ -3532,7 +3532,7 @@ class Diaspora {
 
 		// Old way - is used by the internal Friendica functions
 		/// @todo Change all signatur storing functions to the new format
-		if ($signature['signed_text'] AND $signature['signature'] AND $signature['signer'])
+		if ($signature['signed_text'] && $signature['signature'] && $signature['signer'])
 			$message = self::message_from_signature($item, $signature);
 		else {// New way
 			$msg = json_decode($signature['signed_text'], true);
@@ -3584,7 +3584,7 @@ class Diaspora {
 			$target_type = "StatusMessage";
 		}
 
-		if ($relay AND ($item["uri"] !== $item["parent-uri"]))
+		if ($relay && ($item["uri"] !== $item["parent-uri"]))
 			$signature = "parent_author_signature";
 		else
 			$signature = "target_author_signature";
@@ -3764,7 +3764,7 @@ class Diaspora {
 	public static function store_like_signature($contact, $post_id) {
 
 		// Is the contact the owner? Then fetch the private key
-		if (!$contact['self'] OR ($contact['uid'] == 0)) {
+		if (!$contact['self'] || ($contact['uid'] == 0)) {
 			logger("No owner post, so not storing signature", LOGGER_DEBUG);
 			return false;
 		}
diff --git a/include/discover_poco.php b/include/discover_poco.php
index e71c26fc18..11794c32d7 100644
--- a/include/discover_poco.php
+++ b/include/discover_poco.php
@@ -81,12 +81,12 @@ function discover_poco_run(&$argv, &$argc) {
 		logger($result, LOGGER_DEBUG);
 	} elseif ($mode == 3) {
 		update_suggestions();
-	} elseif (($mode == 2) AND get_config('system','poco_completion')) {
+	} elseif (($mode == 2) && get_config('system','poco_completion')) {
 		discover_users();
-	} elseif (($mode == 1) AND ($search != "") and get_config('system','poco_local_search')) {
+	} elseif (($mode == 1) && ($search != "") and get_config('system','poco_local_search')) {
 		discover_directory($search);
 		gs_search_user($search);
-	} elseif (($mode == 0) AND ($search == "") and (get_config('system','poco_discovery') > 0)) {
+	} elseif (($mode == 0) && ($search == "") and (get_config('system','poco_discovery') > 0)) {
 		// Query Friendica and Hubzilla servers for their users
 		poco_discover();
 
@@ -176,7 +176,7 @@ function discover_users() {
 			$server_url = $user["server_url"];
 		}
 
-		if ((($server_url == "") AND ($user["network"] == NETWORK_FEED)) OR $force_update OR poco_check_server($server_url, $user["network"])) {
+		if ((($server_url == "") && ($user["network"] == NETWORK_FEED)) || $force_update || poco_check_server($server_url, $user["network"])) {
 			logger('Check profile '.$user["url"]);
 			proc_run(PRIORITY_LOW, "include/discover_poco.php", "check_profile", base64_encode($user["url"]));
 
@@ -216,7 +216,7 @@ function discover_directory($search) {
 			if (dbm::is_result($exists)) {
 				logger("Profile ".$jj->url." already exists (".$search.")", LOGGER_DEBUG);
 
-				if (($exists[0]["last_contact"] < $exists[0]["last_failure"]) AND
+				if (($exists[0]["last_contact"] < $exists[0]["last_failure"]) &&
 					($exists[0]["updated"] < $exists[0]["last_failure"])) {
 					continue;
 				}
diff --git a/include/enotify.php b/include/enotify.php
index 08129da1a5..d0fcbeef10 100644
--- a/include/enotify.php
+++ b/include/enotify.php
@@ -99,7 +99,7 @@ function notification($params) {
 			intval($parent_id),
 			intval($params['uid'])
 		);
-		if ($p AND count($p) AND ($p[0]["ignored"])) {
+		if ($p && count($p) && ($p[0]["ignored"])) {
 			logger("Thread ".$parent_id." will be ignored", LOGGER_DEBUG);
 			return;
 		}
@@ -515,7 +515,7 @@ function notification($params) {
 
 		logger('sending notification email');
 
-		if (isset($params['parent']) AND (intval($params['parent']) != 0)) {
+		if (isset($params['parent']) && (intval($params['parent']) != 0)) {
 			$id_for_parent = $params['parent']."@".$hostname;
 
 			// Is this the first email notification for this parent item and user?
@@ -676,7 +676,7 @@ function check_item_notification($itemid, $uid, $defaulttype = "") {
 		// Check for invalid profile urls. 13 should be the shortest possible profile length:
 		// http://a.bc/d
 		// Additionally check for invalid urls that would return the normalised value "http:"
-		if ((strlen($profile) >= 13) AND (normalise_link($profile) != "http:")) {
+		if ((strlen($profile) >= 13) && (normalise_link($profile) != "http:")) {
 			if (!in_array($profile, $profiles2))
 				$profiles2[] = $profile;
 
@@ -760,11 +760,11 @@ function check_item_notification($itemid, $uid, $defaulttype = "") {
 	$tagged = false;
 
 	foreach ($profiles AS $profile) {
-		if (strpos($item[0]["tag"], "=".$profile."]") OR strpos($item[0]["body"], "=".$profile."]"))
+		if (strpos($item[0]["tag"], "=".$profile."]") || strpos($item[0]["body"], "=".$profile."]"))
 			$tagged = true;
 	}
 
-	if ($item[0]["mention"] OR $tagged OR ($defaulttype == NOTIFY_TAGSELF)) {
+	if ($item[0]["mention"] || $tagged || ($defaulttype == NOTIFY_TAGSELF)) {
 		$params["type"] = NOTIFY_TAGSELF;
 		$params["verb"] = ACTIVITY_TAG;
 	}
@@ -776,7 +776,7 @@ function check_item_notification($itemid, $uid, $defaulttype = "") {
 			LIMIT 1",
 			intval($item[0]["parent"]), intval($uid));
 
-	if ($parent AND !isset($params["type"])) {
+	if ($parent && !isset($params["type"])) {
 		$params["type"] = NOTIFY_COMMENT;
 		$params["verb"] = ACTIVITY_POST;
 	}
diff --git a/include/follow.php b/include/follow.php
index cdeac6db2a..711579ff5a 100644
--- a/include/follow.php
+++ b/include/follow.php
@@ -30,10 +30,10 @@ function update_contact($id) {
 
 	// make sure to not overwrite existing values with blank entries
 	foreach ($ret AS $key => $val) {
-		if (isset($r[0][$key]) AND ($r[0][$key] != "") AND ($val == ""))
+		if (isset($r[0][$key]) && ($r[0][$key] != "") && ($val == ""))
 			$ret[$key] = $r[0][$key];
 
-		if (isset($r[0][$key]) AND ($ret[$key] != $r[0][$key]))
+		if (isset($r[0][$key]) && ($ret[$key] != $r[0][$key]))
 			$update = true;
 	}
 
diff --git a/include/gprobe.php b/include/gprobe.php
index 8e9ebd1227..788a9eb044 100644
--- a/include/gprobe.php
+++ b/include/gprobe.php
@@ -47,7 +47,7 @@ function gprobe_run(&$argv, &$argc){
 	}
 	if (dbm::is_result($r)) {
 		// Check for accessibility and do a poco discovery
-		if (poco_last_updated($r[0]['url'], true) AND ($r[0]["network"] == NETWORK_DFRN))
+		if (poco_last_updated($r[0]['url'], true) && ($r[0]["network"] == NETWORK_DFRN))
 			poco_load(0,0,$r[0]['id'], str_replace('/profile/','/poco/',$r[0]['url']));
 	}
 
diff --git a/include/group.php b/include/group.php
index fa0e8f59a6..ab805e6874 100644
--- a/include/group.php
+++ b/include/group.php
@@ -22,7 +22,7 @@ function group_add($uid,$name) {
 					intval($uid),
 					dbesc($name)
 				);
-				notice( t('A deleted group with this name was revived. Existing item permissions <strong>may</strong> apply to this group and any future members. If this is not what you intended, please create another group with a different name.') . EOL); 
+				notice( t('A deleted group with this name was revived. Existing item permissions <strong>may</strong> apply to this group and any future members. If this is not what you intended, please create another group with a different name.') . EOL);
 			}
 			return true;
 		}
@@ -320,7 +320,7 @@ function expand_groups($a,$check_dead = false, $use_gcontact = false) {
 	if (dbm::is_result($r))
 		foreach ($r as $rr)
 			$ret[] = $rr['contact-id'];
-	if ($check_dead AND !$use_gcontact) {
+	if ($check_dead && !$use_gcontact) {
 		require_once('include/acl_selectors.php');
 		$ret = prune_deadguys($ret);
 	}
diff --git a/include/html2plain.php b/include/html2plain.php
index ed338ce710..da308a5c69 100644
--- a/include/html2plain.php
+++ b/include/html2plain.php
@@ -212,7 +212,7 @@ function html2plain($html, $wraplength = 75, $compact = false)
 
 	$message = html_entity_decode($message, ENT_QUOTES, 'UTF-8');
 
-	if (!$compact AND ($message != "")) {
+	if (!$compact && ($message != "")) {
 		$counter = 1;
 		foreach ($urls as $id=>$url)
 			if ($url != "")
diff --git a/include/identity.php b/include/identity.php
index 25b24f289b..c733bea31b 100644
--- a/include/identity.php
+++ b/include/identity.php
@@ -217,7 +217,7 @@ function profile_sidebar($profile, $block = 0) {
 
 	$profile['picdate'] = urlencode($profile['picdate']);
 
-	if (($profile['network'] != "") AND ($profile['network'] != NETWORK_DFRN)) {
+	if (($profile['network'] != "") && ($profile['network'] != NETWORK_DFRN)) {
 		$profile['network_name'] = format_network_name($profile['network'], $profile['url']);
 	} else {
 		$profile['network_name'] = "";
@@ -240,7 +240,7 @@ function profile_sidebar($profile, $block = 0) {
 	}
 
 	// Is the local user already connected to that user?
-	if ($connect AND local_user()) {
+	if ($connect && local_user()) {
 		if (isset($profile["url"])) {
 			$profile_url = normalise_link($profile["url"]);
 		} else {
@@ -254,19 +254,19 @@ function profile_sidebar($profile, $block = 0) {
 			$connect = false;
 	}
 
-	if ($connect AND ($profile['network'] != NETWORK_DFRN) AND !isset($profile['remoteconnect']))
+	if ($connect && ($profile['network'] != NETWORK_DFRN) && !isset($profile['remoteconnect']))
 		$connect = false;
 
 	$remoteconnect = NULL;
 	if (isset($profile['remoteconnect']))
 		$remoteconnect = $profile['remoteconnect'];
 
-	if ($connect AND ($profile['network'] == NETWORK_DFRN) AND !isset($remoteconnect))
+	if ($connect && ($profile['network'] == NETWORK_DFRN) && !isset($remoteconnect))
 		$subscribe_feed = t("Atom feed");
 	else
 		$subscribe_feed = false;
 
-	if (remote_user() OR (get_my_url() && $profile['unkmail'] && ($profile['uid'] != local_user()))) {
+	if (remote_user() || (get_my_url() && $profile['unkmail'] && ($profile['uid'] != local_user()))) {
 		$wallmessage = t('Message');
 		$wallmessage_link = "wallmessage/".$profile["nickname"];
 
@@ -379,7 +379,7 @@ function profile_sidebar($profile, $block = 0) {
 	if (!$block) {
 		$contact_block = contact_block();
 
-		if (is_array($a->profile) AND !$a->profile['hide-friends']) {
+		if (is_array($a->profile) && !$a->profile['hide-friends']) {
 			$r = q("SELECT `gcontact`.`updated` FROM `contact` INNER JOIN `gcontact` WHERE `gcontact`.`nurl` = `contact`.`nurl` AND `self` AND `uid` = %d LIMIT 1",
 				intval($a->profile['uid']));
 			if (dbm::is_result($r))
diff --git a/include/items.php b/include/items.php
index 4a68bd2864..234c001942 100644
--- a/include/items.php
+++ b/include/items.php
@@ -159,16 +159,16 @@ function add_page_info_data($data) {
 
 	// It maybe is a rich content, but if it does have everything that a link has,
 	// then treat it that way
-	if (($data["type"] == "rich") AND is_string($data["title"]) AND
-		is_string($data["text"]) AND (sizeof($data["images"]) > 0)) {
+	if (($data["type"] == "rich") && is_string($data["title"]) &&
+		is_string($data["text"]) && (sizeof($data["images"]) > 0)) {
 		$data["type"] = "link";
 	}
 
-	if ((($data["type"] != "link") AND ($data["type"] != "video") AND ($data["type"] != "photo")) OR ($data["title"] == $data["url"])) {
+	if ((($data["type"] != "link") && ($data["type"] != "video") && ($data["type"] != "photo")) || ($data["title"] == $data["url"])) {
 		return "";
 	}
 
-	if ($no_photos AND ($data["type"] == "photo")) {
+	if ($no_photos && ($data["type"] == "photo")) {
 		return "";
 	}
 
@@ -204,7 +204,7 @@ function add_page_info_data($data) {
 		$preview = str_replace(array("[", "]"), array("&#91;", "&#93;"), htmlentities($data["images"][0]["src"], ENT_QUOTES, 'UTF-8', false));
 		// if the preview picture is larger than 500 pixels then show it in a larger mode
 		// But only, if the picture isn't higher than large (To prevent huge posts)
-		if (($data["images"][0]["width"] >= 500) AND ($data["images"][0]["width"] >= $data["images"][0]["height"])) {
+		if (($data["images"][0]["width"] >= 500) && ($data["images"][0]["width"] >= $data["images"][0]["height"])) {
 			$text .= " image='".$preview."'";
 		} else {
 			$text .= " preview='".$preview."'";
@@ -214,7 +214,7 @@ function add_page_info_data($data) {
 	$text .= "]".$data["text"]."[/attachment]";
 
 	$hashtags = "";
-	if (isset($data["keywords"]) AND count($data["keywords"])) {
+	if (isset($data["keywords"]) && count($data["keywords"])) {
 		$hashtags = "\n";
 		foreach ($data["keywords"] AS $keyword) {
 			/// @todo make a positive list of allowed characters
@@ -237,11 +237,11 @@ function query_page_info($url, $no_photos = false, $photo = "", $keywords = fals
 
 	logger('fetch page info for ' . $url . ' ' . print_r($data, true), LOGGER_DEBUG);
 
-	if (!$keywords AND isset($data["keywords"])) {
+	if (!$keywords && isset($data["keywords"])) {
 		unset($data["keywords"]);
 	}
 
-	if (($keyword_blacklist != "") AND isset($data["keywords"])) {
+	if (($keyword_blacklist != "") && isset($data["keywords"])) {
 		$list = explode(", ", $keyword_blacklist);
 		foreach ($list AS $keyword) {
 			$keyword = trim($keyword);
@@ -259,7 +259,7 @@ function add_page_keywords($url, $no_photos = false, $photo = "", $keywords = fa
 	$data = query_page_info($url, $no_photos, $photo, $keywords, $keyword_blacklist);
 
 	$tags = "";
-	if (isset($data["keywords"]) AND count($data["keywords"])) {
+	if (isset($data["keywords"]) && count($data["keywords"])) {
 		foreach ($data["keywords"] AS $keyword) {
 			$hashtag = str_replace(array(" ", "+", "/", ".", "#", "'"),
 				array("", "", "", "", "", ""), $keyword);
@@ -301,7 +301,7 @@ function add_page_info_to_body($body, $texturl = false, $no_photos = false) {
 	}
 
 	// Convert urls without bbcode elements
-	if (!$matches AND $texturl) {
+	if (!$matches && $texturl) {
 		preg_match("/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", " ".$body, $matches);
 
 		// Yeah, a hack. I really hate regular expressions :)
@@ -315,21 +315,21 @@ function add_page_info_to_body($body, $texturl = false, $no_photos = false) {
 	}
 
 	// Remove the link from the body if the link is attached at the end of the post
-	if (isset($footer) AND (trim($footer) != "") AND (strpos($footer, $matches[1]))) {
+	if (isset($footer) && (trim($footer) != "") && (strpos($footer, $matches[1]))) {
 		$removedlink = trim(str_replace($matches[1], "", $body));
-		if (($removedlink == "") OR strstr($body, $removedlink)) {
+		if (($removedlink == "") || strstr($body, $removedlink)) {
 			$body = $removedlink;
 		}
 
 		$url = str_replace(array('/', '.'), array('\/', '\.'), $matches[1]);
 		$removedlink = preg_replace("/\[url\=" . $url . "\](.*?)\[\/url\]/ism", '', $body);
-		if (($removedlink == "") OR strstr($body, $removedlink)) {
+		if (($removedlink == "") || strstr($body, $removedlink)) {
 			$body = $removedlink;
 		}
 	}
 
 	// Add the page information to the bottom
-	if (isset($footer) AND (trim($footer) != "")) {
+	if (isset($footer) && (trim($footer) != "")) {
 		$body .= $footer;
 	}
 
@@ -421,10 +421,10 @@ function store_conversation($arr) {
 	if (in_array($arr['network'], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS))) {
 		$conversation = array('item-uri' => $arr['uri'], 'received' => dbm::date());
 
-		if (isset($arr['parent-uri']) AND ($arr['parent-uri'] != $arr['uri'])) {
+		if (isset($arr['parent-uri']) && ($arr['parent-uri'] != $arr['uri'])) {
 			$conversation['reply-to-uri'] = $arr['parent-uri'];
 		}
-		if (isset($arr['thr-parent']) AND ($arr['thr-parent'] != $arr['uri'])) {
+		if (isset($arr['thr-parent']) && ($arr['thr-parent'] != $arr['uri'])) {
 			$conversation['reply-to-uri'] = $arr['thr-parent'];
 		}
 
@@ -453,7 +453,7 @@ function store_conversation($arr) {
 				unset($old_conv['source']);
 			}
 			// Update structure data all the time but the source only when its from a better protocol.
-			if (($old_conv['protocol'] < $conversation['protocol']) AND ($old_conv['protocol'] != 0)) {
+			if (($old_conv['protocol'] < $conversation['protocol']) && ($old_conv['protocol'] != 0)) {
 				unset($conversation['protocol']);
 				unset($conversation['source']);
 			}
@@ -503,9 +503,9 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 
 	if ($notify) {
 		$guid_prefix = "";
-	} elseif ((trim($arr['guid']) == "") AND (trim($arr['plink']) != "")) {
+	} elseif ((trim($arr['guid']) == "") && (trim($arr['plink']) != "")) {
 		$arr['guid'] = uri_to_guid($arr['plink']);
-	} elseif ((trim($arr['guid']) == "") AND (trim($arr['uri']) != "")) {
+	} elseif ((trim($arr['guid']) == "") && (trim($arr['uri']) != "")) {
 		$arr['guid'] = uri_to_guid($arr['uri']);
 	} else {
 		$parsed = parse_url($arr["author-link"]);
@@ -653,7 +653,7 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 		$arr['edited'] = datetime_convert();
 	}
 
-	if (($arr['author-link'] == "") AND ($arr['owner-link'] == "")) {
+	if (($arr['author-link'] == "") && ($arr['owner-link'] == "")) {
 		logger("Both author-link and owner-link are empty. Called by: " . App::callstack(), LOGGER_DEBUG);
 	}
 
@@ -832,7 +832,7 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 				$a = get_app();
 				$self = normalise_link(App::get_baseurl() . '/profile/' . $u[0]['nickname']);
 				logger("item_store: 'myself' is ".$self." for parent ".$parent_id." checking against ".$arr['author-link']." and ".$arr['owner-link'], LOGGER_DEBUG);
-				if ((normalise_link($arr['author-link']) == $self) OR (normalise_link($arr['owner-link']) == $self)) {
+				if ((normalise_link($arr['author-link']) == $self) || (normalise_link($arr['owner-link']) == $self)) {
 					q("UPDATE `thread` SET `mention` = 1 WHERE `iid` = %d", intval($parent_id));
 					logger("item_store: tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
 				}
@@ -1051,7 +1051,7 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 
 	// update the commented timestamp on the parent
 	// Only update "commented" if it is really a comment
-	if (($arr['verb'] == ACTIVITY_POST) OR !get_config("system", "like_no_comment")) {
+	if (($arr['verb'] == ACTIVITY_POST) || !get_config("system", "like_no_comment")) {
 		q("UPDATE `item` SET `commented` = '%s', `changed` = '%s' WHERE `id` = %d",
 			dbesc(datetime_convert()),
 			dbesc(datetime_convert()),
@@ -1089,7 +1089,7 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 	 * current post can be deleted if is for a community page and no mention are
 	 * in it.
 	 */
-	if (!$deleted AND !$dontcache) {
+	if (!$deleted && !$dontcache) {
 
 		$r = q('SELECT * FROM `item` WHERE `id` = %d', intval($current_post));
 		if ((dbm::is_result($r)) && (count($r) == 1)) {
@@ -1156,10 +1156,10 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
  */
 function item_set_last_item($arr) {
 
-	$update = (!$arr['private'] AND (($arr["author-link"] === $arr["owner-link"]) OR ($arr["parent-uri"] === $arr["uri"])));
+	$update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
 
 	// Is it a forum? Then we don't care about the rules from above
-	if (!$update AND ($arr["network"] == NETWORK_DFRN) AND ($arr["parent-uri"] === $arr["uri"])) {
+	if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
 		$isforum = q("SELECT `forum` FROM `contact` WHERE `id` = %d AND `forum`",
 				intval($arr['contact-id']));
 		if (dbm::is_result($isforum)) {
@@ -1600,7 +1600,7 @@ function item_is_remote_self($contact, &$datarray) {
 		return false;
 	}
 
-	if (($contact['network'] != NETWORK_FEED) AND $datarray['private']) {
+	if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
 		return false;
 	}
 
@@ -1701,7 +1701,7 @@ function new_follower($importer, $contact, $datarray, $item, $sharing = false) {
 			intval($importer['uid'])
 		);
 
-		if (dbm::is_result($r) AND !in_array($r[0]['page-flags'], array(PAGE_SOAPBOX, PAGE_FREELOVE))) {
+		if (dbm::is_result($r) && !in_array($r[0]['page-flags'], array(PAGE_SOAPBOX, PAGE_FREELOVE))) {
 
 			// create notification
 			$hash = random_string();
@@ -1741,7 +1741,7 @@ function new_follower($importer, $contact, $datarray, $item, $sharing = false) {
 				));
 
 			}
-		} elseif (dbm::is_result($r) AND in_array($r[0]['page-flags'], array(PAGE_SOAPBOX, PAGE_FREELOVE))) {
+		} elseif (dbm::is_result($r) && in_array($r[0]['page-flags'], array(PAGE_SOAPBOX, PAGE_FREELOVE))) {
 			$r = q("UPDATE `contact` SET `pending` = 0 WHERE `uid` = %d AND `url` = '%s' AND `pending` LIMIT 1",
 					intval($importer['uid']),
 					dbesc($url)
@@ -1803,7 +1803,7 @@ function subscribe_to_hub($url, $importer, $contact, $hubmode = 'subscribe') {
 
 	logger('subscribe_to_hub: ' . $hubmode . ' ' . $contact['name'] . ' to hub ' . $url . ' endpoint: '  . $push_url . ' with verifier ' . $verify_token);
 
-	if (!strlen($contact['hub-verify']) OR ($contact['hub-verify'] != $verify_token)) {
+	if (!strlen($contact['hub-verify']) || ($contact['hub-verify'] != $verify_token)) {
 		$r = q("UPDATE `contact` SET `hub-verify` = '%s' WHERE `id` = %d",
 			dbesc($verify_token),
 			intval($contact['id'])
diff --git a/include/nav.php b/include/nav.php
index 3c7c932e28..435e892d91 100644
--- a/include/nav.php
+++ b/include/nav.php
@@ -121,7 +121,7 @@ function nav_info(App $a)
 		$nav['apps'] = array('apps', t('Apps'), '', t('Addon applications, utilities, games'));
 	}
 
-	if (local_user() OR !get_config('system', 'local_search')) {
+	if (local_user() || !get_config('system', 'local_search')) {
 		$nav['search'] = array('search', t('Search'), '', t('Search site content'));
 
 		$nav['searchoption'] = array(
diff --git a/include/network.php b/include/network.php
index 7d8cf36118..035abc478a 100644
--- a/include/network.php
+++ b/include/network.php
@@ -187,7 +187,7 @@ function z_fetch_url($url, $binary = false, &$redirects = 0, $opts = array()) {
 
 		$newurl = $curl_info['redirect_url'];
 
-		if (($new_location_info['path'] == '') AND ( $new_location_info['host'] != '')) {
+		if (($new_location_info['path'] == '') && ( $new_location_info['host'] != '')) {
 			$newurl = $new_location_info['scheme'] . '://' . $new_location_info['host'] . $old_location_info['path'];
 		}
 
@@ -818,8 +818,8 @@ function original_url($url, $depth = 1, $fetchbody = false) {
 	if ($http_code == 0)
 		return($url);
 
-	if ((($curl_info['http_code'] == "301") OR ($curl_info['http_code'] == "302"))
-		AND (($curl_info['redirect_url'] != "") OR ($curl_info['location'] != ""))) {
+	if ((($curl_info['http_code'] == "301") || ($curl_info['http_code'] == "302"))
+		&& (($curl_info['redirect_url'] != "") || ($curl_info['location'] != ""))) {
 		if ($curl_info['redirect_url'] != "")
 			return(original_url($curl_info['redirect_url'], ++$depth, $fetchbody));
 		else
@@ -835,7 +835,7 @@ function original_url($url, $depth = 1, $fetchbody = false) {
 		return($url);
 
 	// if it isn't a HTML file then exit
-	if (($curl_info["content_type"] != "") AND !strstr(strtolower($curl_info["content_type"]),"html"))
+	if (($curl_info["content_type"] != "") && !strstr(strtolower($curl_info["content_type"]),"html"))
 		return($url);
 
 	$stamp1 = microtime(true);
@@ -929,7 +929,7 @@ function json_return_and_die($x) {
  */
 function matching_url($url1, $url2) {
 
-	if (($url1 == "") OR ($url2 == ""))
+	if (($url1 == "") || ($url2 == ""))
 		return "";
 
 	$url1 = normalise_link($url1);
@@ -938,7 +938,7 @@ function matching_url($url1, $url2) {
 	$parts1 = parse_url($url1);
 	$parts2 = parse_url($url2);
 
-	if (!isset($parts1["host"]) OR !isset($parts2["host"]))
+	if (!isset($parts1["host"]) || !isset($parts2["host"]))
 		return "";
 
 	if ($parts1["scheme"] != $parts2["scheme"])
@@ -967,7 +967,7 @@ function matching_url($url1, $url2) {
 		if ($path1 == $path2)
 			$path .= $path1."/";
 
-	} while (($path1 == $path2) AND ($i++ <= count($pathparts1)));
+	} while (($path1 == $path2) && ($i++ <= count($pathparts1)));
 
 	$match .= $path;
 
diff --git a/include/notifier.php b/include/notifier.php
index a08057f677..94124fee1f 100644
--- a/include/notifier.php
+++ b/include/notifier.php
@@ -306,13 +306,13 @@ function notifier_run(&$argv, &$argc){
 			$recipients = array($parent['contact-id']);
 			$recipients_followup  = array($parent['contact-id']);
 
-			//if (!$target_item['private'] AND $target_item['wall'] AND
-			if (!$target_item['private'] AND
+			//if (!$target_item['private'] && $target_item['wall'] &&
+			if (!$target_item['private'] &&
 				(strlen($target_item['allow_cid'].$target_item['allow_gid'].
 					$target_item['deny_cid'].$target_item['deny_gid']) == 0))
 				$push_notify = true;
 
-			if (($thr_parent AND ($thr_parent[0]['network'] == NETWORK_OSTATUS)) OR ($parent['network'] == NETWORK_OSTATUS)) {
+			if (($thr_parent && ($thr_parent[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
 
 				$push_notify = true;
 
@@ -396,7 +396,7 @@ function notifier_run(&$argv, &$argc){
 
 		// If the thread parent is OStatus then do some magic to distribute the messages.
 		// We have not only to look at the parent, since it could be a Friendica thread.
-		if (($thr_parent AND ($thr_parent[0]['network'] == NETWORK_OSTATUS)) OR ($parent['network'] == NETWORK_OSTATUS)) {
+		if (($thr_parent && ($thr_parent[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
 
 			$diaspora_delivery = false;
 
@@ -573,7 +573,7 @@ function notifier_run(&$argv, &$argc){
 	}
 
 	// Notify PuSH subscribers (Used for OStatus distribution of regular posts)
-	if ($push_notify AND strlen($hub)) {
+	if ($push_notify && strlen($hub)) {
 		$hubs = explode(',', $hub);
 		if (count($hubs)) {
 			foreach ($hubs as $h) {
diff --git a/include/oembed.php b/include/oembed.php
index d28a97e322..0f3296b254 100755
--- a/include/oembed.php
+++ b/include/oembed.php
@@ -108,7 +108,7 @@ function oembed_fetch_url($embedurl, $no_rich_type = false){
 	$j->embedurl = $embedurl;
 
 	// If fetching information doesn't work, then improve via internal functions
-	if (($j->type == "error") OR ($no_rich_type AND ($j->type == "rich"))) {
+	if (($j->type == "error") || ($no_rich_type && ($j->type == "rich"))) {
 		$data = ParseUrl::getSiteinfoCached($embedurl, true, false);
 		$j->type = $data["type"];
 
@@ -194,7 +194,7 @@ function oembed_format_object($j){
 			if (isset($j->author_name)) {
 				$ret.=" (".$j->author_name.")";
 			}
-		} elseif (isset($j->provider_name) OR isset($j->author_name)) {
+		} elseif (isset($j->provider_name) || isset($j->author_name)) {
 			$embedlink = "";
 			if (isset($j->provider_name)) {
 				$embedlink .= $j->provider_name;
diff --git a/include/onepoll.php b/include/onepoll.php
index cf5a1f576a..bcb9d09be2 100644
--- a/include/onepoll.php
+++ b/include/onepoll.php
@@ -68,7 +68,7 @@ function onepoll_run(&$argv, &$argc){
 	$contact = $contacts[0];
 
 	// load current friends if possible.
-	if (($contact['poco'] != "") AND ($contact['success_update'] > $contact['failure_update'])) {
+	if (($contact['poco'] != "") && ($contact['success_update'] > $contact['failure_update'])) {
 		$r = q("SELECT count(*) as total from glink
 			where `cid` = %d and updated > UTC_TIMESTAMP() - INTERVAL 1 DAY",
 			intval($contact['id'])
@@ -395,7 +395,7 @@ function onepoll_run(&$argv, &$argc){
 							logger("Mail: Seen before ".$msg_uid." for ".$mailconf[0]['user']." UID: ".$importer_uid." URI: ".$datarray['uri'],LOGGER_DEBUG);
 
 							// Only delete when mails aren't automatically moved or deleted
-							if (($mailconf[0]['action'] != 1) AND ($mailconf[0]['action'] != 3))
+							if (($mailconf[0]['action'] != 1) && ($mailconf[0]['action'] != 3))
 								if ($meta->deleted && ! $r[0]['deleted']) {
 									q("UPDATE `item` SET `deleted` = 1, `changed` = '%s' WHERE `id` = %d",
 										dbesc(datetime_convert()),
diff --git a/include/ostatus.php b/include/ostatus.php
index 2b52de7344..16471f4d4c 100644
--- a/include/ostatus.php
+++ b/include/ostatus.php
@@ -54,7 +54,7 @@ class ostatus {
 		$alternate = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0)->attributes;
 		if (is_object($alternate)) {
 			foreach ($alternate AS $attributes) {
-				if (($attributes->name == "href") AND ($attributes->textContent != "")) {
+				if (($attributes->name == "href") && ($attributes->textContent != "")) {
 					$author["author-link"] = $attributes->textContent;
 				}
 			}
@@ -100,7 +100,7 @@ class ostatus {
 					$width = $attributes->textContent;
 				}
 			}
-			if (($width > 0) AND ($href != "")) {
+			if (($width > 0) && ($href != "")) {
 				$avatarlist[$width] = $href;
 			}
 		}
@@ -119,7 +119,7 @@ class ostatus {
 		$author["owner-avatar"] = $author["author-avatar"];
 
 		// Only update the contacts if it is an OStatus contact
-		if ($r AND !$onlyfetch AND ($contact["network"] == NETWORK_OSTATUS)) {
+		if ($r && !$onlyfetch && ($contact["network"] == NETWORK_OSTATUS)) {
 
 			// Update contact data
 
@@ -153,8 +153,8 @@ class ostatus {
 			if ($value != "")
 				$contact["location"] = $value;
 
-			if (($contact["name"] != $r[0]["name"]) OR ($contact["nick"] != $r[0]["nick"]) OR ($contact["about"] != $r[0]["about"]) OR
-				($contact["alias"] != $r[0]["alias"]) OR ($contact["location"] != $r[0]["location"])) {
+			if (($contact["name"] != $r[0]["name"]) || ($contact["nick"] != $r[0]["nick"]) || ($contact["about"] != $r[0]["about"]) ||
+				($contact["alias"] != $r[0]["alias"]) || ($contact["location"] != $r[0]["location"])) {
 
 				logger("Update contact data for contact ".$contact["id"], LOGGER_DEBUG);
 
@@ -164,7 +164,7 @@ class ostatus {
 					dbesc(datetime_convert()), intval($contact["id"]));
 			}
 
-			if (isset($author["author-avatar"]) AND ($author["author-avatar"] != $r[0]['avatar'])) {
+			if (isset($author["author-avatar"]) && ($author["author-avatar"] != $r[0]['avatar'])) {
 				logger("Update profile picture for contact ".$contact["id"], LOGGER_DEBUG);
 
 				update_contact_avatar($author["author-avatar"], $importer["uid"], $contact["id"]);
@@ -354,13 +354,13 @@ class ostatus {
 			$item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
 
 			// Mastodon Content Warning
-			if (($item["verb"] == ACTIVITY_POST) AND $xpath->evaluate('boolean(atom:summary)', $entry)) {
+			if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 				$clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 
 				$item["body"] = html2bbcode($clear_text) . '[spoiler]' . $item["body"] . '[/spoiler]';
 			}
 
-			if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) OR ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
+			if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
 				$item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
 				$item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 			} elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
@@ -469,11 +469,11 @@ class ostatus {
 				foreach ($links AS $link) {
 					$attribute = self::read_attributes($link);
 
-					if (($attribute['rel'] != "") AND ($attribute['href'] != "")) {
+					if (($attribute['rel'] != "") && ($attribute['href'] != "")) {
 						switch ($attribute['rel']) {
 							case "alternate":
 								$item["plink"] = $attribute['href'];
-								if (($item["object-type"] == ACTIVITY_OBJ_QUESTION) OR
+								if (($item["object-type"] == ACTIVITY_OBJ_QUESTION) ||
 									($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
 									$item["body"] .= add_page_info($attribute['href']);
 								}
@@ -525,7 +525,7 @@ class ostatus {
 			$repeat_of = "";
 
 			$notice_info = $xpath->query('statusnet:notice_info', $entry);
-			if ($notice_info AND ($notice_info->length > 0)) {
+			if ($notice_info && ($notice_info->length > 0)) {
 				foreach ($notice_info->item(0)->attributes AS $attributes) {
 					if ($attributes->name == "source") {
 						$item["app"] = strip_tags($attributes->textContent);
@@ -540,7 +540,7 @@ class ostatus {
 			}
 
 			// Is it a repeated post?
-			if (($repeat_of != "") OR ($item["verb"] == ACTIVITY_SHARE)) {
+			if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
 				$activityobjects = $xpath->query('activity:object', $entry)->item(0);
 
 				if (is_object($activityobjects)) {
@@ -550,7 +550,7 @@ class ostatus {
 						$orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
 					}
 					$orig_links = $xpath->query("activity:object/atom:link[@rel='alternate']", $activityobjects);
-					if ($orig_links AND ($orig_links->length > 0)) {
+					if ($orig_links && ($orig_links->length > 0)) {
 						foreach ($orig_links->item(0)->attributes AS $attributes) {
 							if ($attributes->name == "href") {
 								$orig_link = $attributes->textContent;
@@ -621,8 +621,8 @@ class ostatus {
 					intval($importer["uid"]), dbesc($item["parent-uri"]));
 
 				// Only fetch missing stuff if it is a comment or reshare.
-				if (in_array($item["verb"], array(ACTIVITY_POST, ACTIVITY_SHARE)) AND
-					!dbm::is_result($r) AND ($related != "")) {
+				if (in_array($item["verb"], array(ACTIVITY_POST, ACTIVITY_SHARE)) &&
+					!dbm::is_result($r) && ($related != "")) {
 					$reply_path = str_replace("/notice/", "/api/statuses/show/", $related).".atom";
 
 					if ($reply_path != $related) {
@@ -668,16 +668,16 @@ class ostatus {
 	public static function convert_href($href) {
 		$elements = explode(":",$href);
 
-		if ((count($elements) <= 2) OR ($elements[0] != "tag"))
+		if ((count($elements) <= 2) || ($elements[0] != "tag"))
 			return $href;
 
 		$server = explode(",", $elements[1]);
 		$conversation = explode("=", $elements[2]);
 
-		if ((count($elements) == 4) AND ($elements[2] == "post"))
+		if ((count($elements) == 4) && ($elements[2] == "post"))
 			return "http://".$server[0]."/notice/".$elements[3];
 
-		if ((count($conversation) != 2) OR ($conversation[1] ==""))
+		if ((count($conversation) != 2) || ($conversation[1] ==""))
 			return $href;
 
 		if ($elements[3] == "objectType=thread")
@@ -703,7 +703,7 @@ class ostatus {
 		}
 
 		// Don't poll if the interval is set negative
-		if (($poll_interval < 0) AND !$override) {
+		if (($poll_interval < 0) && !$override) {
 			return;
 		}
 
@@ -720,7 +720,7 @@ class ostatus {
 		}
 
 
-		if ($last AND !$override) {
+		if ($last && !$override) {
 			$next = $last + ($poll_interval * 60);
 			if ($next > time()) {
 				logger('poll interval not reached');
@@ -818,7 +818,7 @@ class ostatus {
 		if ($conversation_id != "") {
 			$elements = explode(":", $conversation_id);
 
-			if ((count($elements) <= 2) OR ($elements[0] != "tag"))
+			if ((count($elements) <= 2) || ($elements[0] != "tag"))
 				return $conversation_id;
 		}
 
@@ -933,8 +933,8 @@ class ostatus {
 
 		// If the thread shouldn't be completed then store the item and go away
 		// Don't do a completion on liked content
-		if (((intval(get_config('system','ostatus_poll_interval')) == -2) AND (count($item) > 0)) OR
-			($item["verb"] == ACTIVITY_LIKE) OR ($conversation_url == "")) {
+		if (((intval(get_config('system','ostatus_poll_interval')) == -2) && (count($item) > 0)) ||
+			($item["verb"] == ACTIVITY_LIKE) || ($conversation_url == "")) {
 			$item_stored = item_store($item, $all_threads);
 			return $item_stored;
 		}
@@ -979,10 +979,10 @@ class ostatus {
 			$conv_arr = z_fetch_url($conv."?page=".$pageno);
 
 			// If it is a non-ssl site and there is an error, then try ssl or vice versa
-			if (!$conv_arr["success"] AND (substr($conv, 0, 7) == "http://")) {
+			if (!$conv_arr["success"] && (substr($conv, 0, 7) == "http://")) {
 				$conv = str_replace("http://", "https://", $conv);
 				$conv_as = fetch_url($conv."?page=".$pageno);
-			} elseif (!$conv_arr["success"] AND (substr($conv, 0, 8) == "https://")) {
+			} elseif (!$conv_arr["success"] && (substr($conv, 0, 8) == "https://")) {
 				$conv = str_replace("https://", "http://", $conv);
 				$conv_as = fetch_url($conv."?page=".$pageno);
 			} else
@@ -1057,7 +1057,7 @@ class ostatus {
 				// 1. Our conversation hasn't the "real" thread starter
 				// 2. This first post is a post inside our thread
 				// 3. This first post is a post inside another thread
-				if (($first_id != $parent["uri"]) AND ($parent["uri"] != "")) {
+				if (($first_id != $parent["uri"]) && ($parent["uri"] != "")) {
 
 					$new_parent = true;
 
@@ -1144,7 +1144,7 @@ class ostatus {
 				}
 
 				// The item we are having on the system is the one that we wanted to store via the item array
-				if (isset($item["uri"]) AND ($item["uri"] == $existing_message["uri"])) {
+				if (isset($item["uri"]) && ($item["uri"] == $existing_message["uri"])) {
 					$item = array();
 					$item_stored = 0;
 				}
@@ -1164,7 +1164,7 @@ class ostatus {
 			$details = self::get_actor_details($actor, $uid, $parent["contact-id"]);
 
 			// Do we only want to import threads that were started by our contacts?
-			if ($details["not_following"] AND $new_parent AND get_config('system','ostatus_full_threads')) {
+			if ($details["not_following"] && $new_parent && get_config('system','ostatus_full_threads')) {
 				logger("Don't import uri ".$first_id." because user ".$uid." doesn't follow the person ".$actor, LOGGER_DEBUG);
 				continue;
 			}
@@ -1218,7 +1218,7 @@ class ostatus {
 			$arr["coord"] = trim($single_conv->location->lat." ".$single_conv->location->lon);
 
 			// Is it a reshared item?
-			if (isset($single_conv->verb) AND ($single_conv->verb == "share") AND isset($single_conv->object)) {
+			if (isset($single_conv->verb) && ($single_conv->verb == "share") && isset($single_conv->object)) {
 				if (is_array($single_conv->object))
 					$single_conv->object = $single_conv->object[0];
 
@@ -1277,7 +1277,7 @@ class ostatus {
 				unset($arr["coord"]);
 
 			// Copy fields from given item array
-			if (isset($item["uri"]) AND (($item["uri"] == $arr["uri"]) OR ($item["uri"] ==  $single_conv->id))) {
+			if (isset($item["uri"]) && (($item["uri"] == $arr["uri"]) || ($item["uri"] ==  $single_conv->id))) {
 				logger('Use stored item array for item with URI '.$item["uri"], LOGGER_DEBUG);
 				$newitem = item_store($item);
 				$item = array();
@@ -1307,7 +1307,7 @@ class ostatus {
 			}
 		}
 
-		if (($item_stored < 0) AND (count($item) > 0)) {
+		if (($item_stored < 0) && (count($item) > 0)) {
 
 			if (get_config('system','ostatus_full_threads')) {
 				$details = self::get_actor_details($item["owner-link"], $uid, $item["contact-id"]);
@@ -1543,7 +1543,7 @@ class ostatus {
 				break;
 		}
 
-		if (($siteinfo["type"] != "photo") AND isset($siteinfo["image"])) {
+		if (($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
 			$imgdata = get_photo_info($siteinfo["image"]);
 			$attributes = array("rel" => "enclosure",
 					"href" => $siteinfo["image"],
@@ -1788,7 +1788,7 @@ class ostatus {
 	 */
 	private function reshare_entry($doc, $item, $owner, $repeated_guid, $toplevel) {
 
-		if (($item["id"] != $item["parent"]) AND (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
+		if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
 			logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
 		}
 
@@ -1854,7 +1854,7 @@ class ostatus {
 	 */
 	private function like_entry($doc, $item, $owner, $toplevel) {
 
-		if (($item["id"] != $item["parent"]) AND (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
+		if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
 			logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
 		}
 
@@ -1999,7 +1999,7 @@ class ostatus {
 	 */
 	private function note_entry($doc, $item, $owner, $toplevel) {
 
-		if (($item["id"] != $item["parent"]) AND (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
+		if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
 			logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
 		}
 
@@ -2080,7 +2080,7 @@ class ostatus {
 		xml::add_element($doc, $entry, "link", "", array("rel" => "alternate", "type" => "text/html",
 								"href" => App::get_baseurl()."/display/".$item["guid"]));
 
-		if ($complete AND ($item["id"] > 0))
+		if ($complete && ($item["id"] > 0))
 			xml::add_element($doc, $entry, "status_net", "", array("notice_id" => $item["id"]));
 
 		xml::add_element($doc, $entry, "activity:verb", $verb);
@@ -2102,7 +2102,7 @@ class ostatus {
 
 		$mentioned = array();
 
-		if (($item['parent'] != $item['id']) OR ($item['parent-uri'] !== $item['uri']) OR (($item['thr-parent'] !== '') AND ($item['thr-parent'] !== $item['uri']))) {
+		if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 			$parent = q("SELECT `guid`, `author-link`, `owner-link` FROM `item` WHERE `id` = %d", intval($item["parent"]));
 			$parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 
@@ -2175,7 +2175,7 @@ class ostatus {
 			$r = q("SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
 				intval($owner["uid"]),
 				dbesc(normalise_link($mention)));
-			if ($r[0]["forum"] OR $r[0]["prv"])
+			if ($r[0]["forum"] || $r[0]["prv"])
 				xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 											"ostatus:object-type" => ACTIVITY_OBJ_GROUP,
 											"href" => $mention));
@@ -2201,7 +2201,7 @@ class ostatus {
 
 		self::get_attachment($doc, $entry, $item);
 
-		if ($complete AND ($item["id"] > 0)) {
+		if ($complete && ($item["id"] > 0)) {
 			$app = $item["app"];
 			if ($app == "")
 				$app = "web";
diff --git a/include/photos.php b/include/photos.php
index 38cda3f2ba..a1faffc259 100644
--- a/include/photos.php
+++ b/include/photos.php
@@ -44,7 +44,7 @@ function photo_albums($uid, $update = false) {
 
 	$key = "photo_albums:".$uid.":".local_user().":".remote_user();
 	$albums = Cache::get($key);
-	if (is_null($albums) OR $update) {
+	if (is_null($albums) || $update) {
 		if (!Config::get('system', 'no_count', false)) {
 			/// @todo This query needs to be renewed. It is really slow
 			// At this time we just store the data in the cache
diff --git a/include/pidfile.php b/include/pidfile.php
index dda6b3e9c1..7157a6e591 100644
--- a/include/pidfile.php
+++ b/include/pidfile.php
@@ -8,7 +8,7 @@ class pidfile {
 
 		if (file_exists($this->_file)) {
 			$pid = trim(@file_get_contents($this->_file));
-			if (($pid != "") AND posix_kill($pid, 0)) {
+			if (($pid != "") && posix_kill($pid, 0)) {
 				$this->_running = true;
 			}
 		}
diff --git a/include/plaintext.php b/include/plaintext.php
index 215d9f3db7..1d16aa2e8d 100644
--- a/include/plaintext.php
+++ b/include/plaintext.php
@@ -54,7 +54,7 @@ function get_old_attachment_data($body) {
 
 				$picturedata = get_photo_info($matches[1]);
 
-				if (($picturedata[0] >= 500) AND ($picturedata[0] >= $picturedata[1]))
+				if (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1]))
 					$post["image"] = $matches[1];
 				else
 					$post["preview"] = $matches[1];
@@ -64,8 +64,8 @@ function get_old_attachment_data($body) {
 				$post["url"] = $matches[1];
 				$post["title"] = $matches[2];
 			}
-			if (($post["url"] == "") AND (in_array($post["type"], array("link", "video")))
-				AND preg_match("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
+			if (($post["url"] == "") && (in_array($post["type"], array("link", "video")))
+				&& preg_match("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
 				$post["url"] = $matches[1];
 			}
 
@@ -204,7 +204,7 @@ function get_attached_data($body) {
 				// Workaround:
 				// Sometimes photo posts to the own album are not detected at the start.
 				// So we seem to cannot use the cache for these cases. That's strange.
-				if (($data["type"] != "photo") AND strstr($pictures[0][1], "/photos/"))
+				if (($data["type"] != "photo") && strstr($pictures[0][1], "/photos/"))
 					$data = ParseUrl::getSiteinfo($pictures[0][1], true);
 
 				if ($data["type"] == "photo") {
@@ -256,7 +256,7 @@ function get_attached_data($body) {
 			$post["type"] = "text";
 			$post["text"] = trim($body);
 		}
-	} elseif (isset($post["url"]) AND ($post["type"] == "video")) {
+	} elseif (isset($post["url"]) && ($post["type"] == "video")) {
 		$data = ParseUrl::getSiteinfoCached($post["url"], true);
 
 		if (isset($data["images"][0]))
@@ -278,7 +278,7 @@ function shortenmsg($msg, $limit, $twitter = false) {
 		if (iconv_strlen(trim($msg."\n".$line), "UTF-8") <= $limit)
 			$msg = trim($msg."\n".$line);
 		// Is the new message empty by now or is it a reshared message?
-		elseif (($msg == "") OR (($row == 1) AND (substr($msg, 0, 4) == $recycle)))
+		elseif (($msg == "") || (($row == 1) && (substr($msg, 0, 4) == $recycle)))
 			$msg = iconv_substr(iconv_substr(trim($msg."\n".$line), 0, $limit, "UTF-8"), 0, -3, "UTF-8").$ellipsis;
 		else
 			break;
@@ -315,7 +315,7 @@ function plaintext(App $a, $b, $limit = 0, $includedlinks = false, $htmlmode = 2
 	//$post = get_attached_data($b["body"]);
 	$post = get_attached_data($body);
 
-	if (($b["title"] != "") AND ($post["text"] != ""))
+	if (($b["title"] != "") && ($post["text"] != ""))
 		$post["text"] = trim($b["title"]."\n\n".$post["text"]);
 	elseif ($b["title"] != "")
 		$post["text"] = trim($b["title"]);
@@ -329,7 +329,7 @@ function plaintext(App $a, $b, $limit = 0, $includedlinks = false, $htmlmode = 2
 
 		// If we post to a network with no limit we only fetch
 		// an abstract exactly for this network
-		if (($limit == 0) AND ($abstract == $default_abstract))
+		if (($limit == 0) && ($abstract == $default_abstract))
 			$abstract = "";
 
 	} else // Try to guess the correct target network
@@ -373,25 +373,25 @@ function plaintext(App $a, $b, $limit = 0, $includedlinks = false, $htmlmode = 2
 		elseif ($post["type"] == "photo")
 			$link = $post["image"];
 
-		if (($msg == "") AND isset($post["title"]))
+		if (($msg == "") && isset($post["title"]))
 			$msg = trim($post["title"]);
 
-		if (($msg == "") AND isset($post["description"]))
+		if (($msg == "") && isset($post["description"]))
 			$msg = trim($post["description"]);
 
 		// If the link is already contained in the post, then it neeedn't to be added again
 		// But: if the link is beyond the limit, then it has to be added.
-		if (($link != "") AND strstr($msg, $link)) {
+		if (($link != "") && strstr($msg, $link)) {
 			$pos = strpos($msg, $link);
 
 			// Will the text be shortened in the link?
 			// Or is the link the last item in the post?
-			if (($limit > 0) AND ($pos < $limit) AND (($pos + 23 > $limit) OR ($pos + strlen($link) == strlen($msg))))
+			if (($limit > 0) && ($pos < $limit) && (($pos + 23 > $limit) || ($pos + strlen($link) == strlen($msg))))
 				$msg = trim(str_replace($link, "", $msg));
-			elseif (($limit == 0) OR ($pos < $limit)) {
+			elseif (($limit == 0) || ($pos < $limit)) {
 				// The limit has to be increased since it will be shortened - but not now
 				// Only do it with Twitter (htmlmode = 8)
-				if (($limit > 0) AND (strlen($link) > 23) AND ($htmlmode == 8))
+				if (($limit > 0) && (strlen($link) > 23) && ($htmlmode == 8))
 					$limit = $limit - 23 + strlen($link);
 
 				$link = "";
@@ -414,7 +414,7 @@ function plaintext(App $a, $b, $limit = 0, $includedlinks = false, $htmlmode = 2
 
 		if (iconv_strlen($msg, "UTF-8") > $limit) {
 
-			if (($post["type"] == "text") AND isset($post["url"]))
+			if (($post["type"] == "text") && isset($post["url"]))
 				$post["url"] = $b["plink"];
 			elseif (!isset($post["url"])) {
 				$limit = $limit - 23;
diff --git a/include/plugin.php b/include/plugin.php
index 9021f814b1..0c43b4d448 100644
--- a/include/plugin.php
+++ b/include/plugin.php
@@ -563,7 +563,7 @@ function theme_include($file, $root = '') {
 		$root = $root . '/';
 	}
 	$theme_info = $a->theme_info;
-	if (is_array($theme_info) AND array_key_exists('extends',$theme_info)) {
+	if (is_array($theme_info) && array_key_exists('extends',$theme_info)) {
 		$parent = $theme_info['extends'];
 	} else {
 		$parent = 'NOPATH';
diff --git a/include/poller.php b/include/poller.php
index fcabe5d8ee..cc8edce656 100644
--- a/include/poller.php
+++ b/include/poller.php
@@ -4,7 +4,7 @@ use Friendica\App;
 use Friendica\Core\Config;
 use Friendica\Util\Lock;
 
-if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
+if (!file_exists("boot.php") && (sizeof($_SERVER["argv"]) != 0)) {
 	$directory = dirname($_SERVER["argv"][0]);
 
 	if (substr($directory, 0, 1) != "/") {
@@ -75,7 +75,7 @@ function poller_run($argv, $argc){
 	}
 
 	// Now we start additional cron processes if we should do so
-	if (($argc <= 1) OR ($argv[1] != "no_cron")) {
+	if (($argc <= 1) || ($argv[1] != "no_cron")) {
 		poller_run_cron();
 	}
 
@@ -467,7 +467,7 @@ function poller_too_much_workers() {
 		$s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` <= '%s'", dbesc(NULL_DATE));
 		$entries = $s[0]["total"];
 
-		if (Config::get("system", "worker_fastlane", false) AND ($queues > 0) AND ($entries > 0) AND ($active >= $queues)) {
+		if (Config::get("system", "worker_fastlane", false) && ($queues > 0) && ($entries > 0) && ($active >= $queues)) {
 			$s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority` LIMIT 1", dbesc(NULL_DATE));
 			$top_priority = $s[0]["priority"];
 
@@ -475,7 +475,7 @@ function poller_too_much_workers() {
 				intval($top_priority), dbesc(NULL_DATE));
 			$high_running = dbm::is_result($s);
 
-			if (!$high_running AND ($top_priority > PRIORITY_UNDEFINED) AND ($top_priority < PRIORITY_NEGLIGIBLE)) {
+			if (!$high_running && ($top_priority > PRIORITY_UNDEFINED) && ($top_priority < PRIORITY_NEGLIGIBLE)) {
 				logger("There are jobs with priority ".$top_priority." waiting but none is executed. Open a fastlane.", LOGGER_DEBUG);
 				$queues = $active + 1;
 			}
@@ -484,7 +484,7 @@ function poller_too_much_workers() {
 		logger("Load: ".$load."/".$maxsysload." - processes: ".$active."/".$entries.$processlist." - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
 
 		// Are there fewer workers running as possible? Then fork a new one.
-		if (!Config::get("system", "worker_dont_fork") AND ($queues > ($active + 1)) AND ($entries > 1)) {
+		if (!Config::get("system", "worker_dont_fork") && ($queues > ($active + 1)) && ($entries > 1)) {
 			logger("Active workers: ".$active."/".$queues." Fork a new worker.", LOGGER_DEBUG);
 			$args = array("include/poller.php", "no_cron");
 			$a = get_app();
@@ -632,7 +632,7 @@ function poller_claim_process($queue) {
 	if (!$id) {
 		logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
 		return false;
-	} elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
+	} elseif ((strtotime($id[0]["executed"]) <= 0) || ($id[0]["pid"] == 0)) {
 		logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
 		return false;
 	} elseif ($id[0]["pid"] != $mypid) {
diff --git a/include/post_update.php b/include/post_update.php
index af49bb555c..8dcf070526 100644
--- a/include/post_update.php
+++ b/include/post_update.php
@@ -45,7 +45,7 @@ function post_update_1192() {
 			WHERE `thread`.`gcontact-id` = 0 AND
 				(`thread`.`uid` IN (SELECT `uid` from `user`) OR `thread`.`uid` = 0)");
 
-		if ($r AND ($r[0]["total"] == 0)) {
+		if ($r && ($r[0]["total"] == 0)) {
 			set_config("system", "post_update_version", 1192);
 			return true;
 		}
@@ -171,7 +171,7 @@ function post_update_1198() {
 			WHERE `thread`.`author-id` = 0 AND `thread`.`owner-id` = 0 AND
 				(`thread`.`uid` IN (SELECT `uid` from `user`) OR `thread`.`uid` = 0)");
 
-		if ($r AND ($r[0]["total"] == 0)) {
+		if ($r && ($r[0]["total"] == 0)) {
 			set_config("system", "post_update_version", 1198);
 			logger("Done", LOGGER_DEBUG);
 			return true;
@@ -247,7 +247,7 @@ function post_update_1206() {
 		return false;
 	}
 	foreach ($r AS $user) {
-		if (!empty($user["lastitem_date"]) AND ($user["lastitem_date"] > $user["last-item"])) {
+		if (!empty($user["lastitem_date"]) && ($user["lastitem_date"] > $user["last-item"])) {
 			q("UPDATE `contact` SET `last-item` = '%s' WHERE `id` = %d",
 				dbesc($user["lastitem_date"]),
 				intval($user["id"]));
diff --git a/include/queue.php b/include/queue.php
index cf5ed9a815..a92f2b2074 100644
--- a/include/queue.php
+++ b/include/queue.php
@@ -83,7 +83,7 @@ function queue_run(&$argv, &$argc){
 
 	$dead = Cache::get($cachekey_deadguy.$c[0]['notify']);
 
-	if (!is_null($dead) AND $dead) {
+	if (!is_null($dead) && $dead) {
 		logger('queue: skipping known dead url: '.$c[0]['notify']);
 		update_queue_time($q_item['id']);
 		return;
@@ -101,7 +101,7 @@ function queue_run(&$argv, &$argc){
 			Cache::set($cachekey_server.$server, $vital, CACHE_QUARTER_HOUR);
 		}
 
-		if (!is_null($vital) AND !$vital) {
+		if (!is_null($vital) && !$vital) {
 			logger('queue: skipping dead server: '.$server);
 			update_queue_time($q_item['id']);
 			return;
diff --git a/include/session.php b/include/session.php
index 055bfcb4ef..5194e7ef0e 100644
--- a/include/session.php
+++ b/include/session.php
@@ -65,7 +65,7 @@ function ref_session_write($id, $data) {
 
 	$memcache = cache::memcache();
 	$a = get_app();
-	if (is_object($memcache) AND is_object($a)) {
+	if (is_object($memcache) && is_object($a)) {
 		$memcache->set($a->get_hostname().":session:".$id, $data, MEMCACHE_COMPRESSED, $expire);
 		return true;
 	}
diff --git a/include/socgraph.php b/include/socgraph.php
index 7a39e388be..eda8e3797c 100644
--- a/include/socgraph.php
+++ b/include/socgraph.php
@@ -150,7 +150,7 @@ function poco_load_worker($cid, $uid, $zcid, $url) {
 			$gender = $entry->gender;
 		}
 
-		if (isset($entry->generation) AND ($entry->generation > 0)) {
+		if (isset($entry->generation) && ($entry->generation > 0)) {
 			$generation = ++$entry->generation;
 		}
 
@@ -160,7 +160,7 @@ function poco_load_worker($cid, $uid, $zcid, $url) {
 			}
 		}
 
-		if (isset($entry->contactType) AND ($entry->contactType >= 0))
+		if (isset($entry->contactType) && ($entry->contactType >= 0))
 			$contact_type = $entry->contactType;
 
 		$gcontact = array("url" => $profile_url,
@@ -238,7 +238,7 @@ function sanitize_gcontact($gcontact) {
 	$alternate = poco_alternate_ostatus_url($gcontact['url']);
 
 	// The global contacts should contain the original picture, not the cached one
-	if (($gcontact['generation'] != 1) AND stristr(normalise_link($gcontact['photo']), normalise_link(App::get_baseurl()."/photo/"))) {
+	if (($gcontact['generation'] != 1) && stristr(normalise_link($gcontact['photo']), normalise_link(App::get_baseurl()."/photo/"))) {
 		$gcontact['photo'] = "";
 	}
 
@@ -250,7 +250,7 @@ function sanitize_gcontact($gcontact) {
 			$gcontact['network'] = $r[0]["network"];
 		}
 
-		if (($gcontact['network'] == "") OR ($gcontact['network'] == NETWORK_OSTATUS)) {
+		if (($gcontact['network'] == "") || ($gcontact['network'] == NETWORK_OSTATUS)) {
 			$r = q("SELECT `network`, `url` FROM `contact` WHERE `uid` = 0 AND `alias` IN ('%s', '%s') AND `network` != '' AND `network` != '%s' LIMIT 1",
 				dbesc($gcontact['url']), dbesc(normalise_link($gcontact['url'])), dbesc(NETWORK_STATUSNET)
 			);
@@ -268,13 +268,13 @@ function sanitize_gcontact($gcontact) {
 	);
 
 	if (count($x)) {
-		if (!isset($gcontact['network']) AND ($x[0]["network"] != NETWORK_STATUSNET)) {
+		if (!isset($gcontact['network']) && ($x[0]["network"] != NETWORK_STATUSNET)) {
 			$gcontact['network'] = $x[0]["network"];
 		}
 		if ($gcontact['updated'] <= NULL_DATE) {
 			$gcontact['updated'] = $x[0]["updated"];
 		}
-		if (!isset($gcontact['server_url']) AND (normalise_link($x[0]["server_url"]) != normalise_link($x[0]["url"]))) {
+		if (!isset($gcontact['server_url']) && (normalise_link($x[0]["server_url"]) != normalise_link($x[0]["url"]))) {
 			$gcontact['server_url'] = $x[0]["server_url"];
 		}
 		if (!isset($gcontact['addr'])) {
@@ -282,8 +282,8 @@ function sanitize_gcontact($gcontact) {
 		}
 	}
 
-	if ((!isset($gcontact['network']) OR !isset($gcontact['name']) OR !isset($gcontact['addr']) OR !isset($gcontact['photo']) OR !isset($gcontact['server_url']) OR $alternate)
-		AND poco_reachable($gcontact['url'], $gcontact['server_url'], $gcontact['network'], false)) {
+	if ((!isset($gcontact['network']) || !isset($gcontact['name']) || !isset($gcontact['addr']) || !isset($gcontact['photo']) || !isset($gcontact['server_url']) || $alternate)
+		&& poco_reachable($gcontact['url'], $gcontact['server_url'], $gcontact['network'], false)) {
 		$data = Probe::uri($gcontact['url']);
 
 		if ($data["network"] == NETWORK_PHANTOM) {
@@ -296,7 +296,7 @@ function sanitize_gcontact($gcontact) {
 
 		$gcontact = array_merge($gcontact, $data);
 
-		if ($alternate AND ($gcontact['network'] == NETWORK_OSTATUS)) {
+		if ($alternate && ($gcontact['network'] == NETWORK_OSTATUS)) {
 			// Delete the old entry - if it exists
 			$r = q("SELECT `id` FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 			if ($r) {
@@ -306,7 +306,7 @@ function sanitize_gcontact($gcontact) {
 		}
 	}
 
-	if (!isset($gcontact['name']) OR !isset($gcontact['photo'])) {
+	if (!isset($gcontact['name']) || !isset($gcontact['photo'])) {
 		throw new Exception('No name and photo for URL '.$gcontact['url']);
 	}
 
@@ -481,11 +481,11 @@ function poco_last_updated($profile, $force = false) {
 		$server_url = normalise_link(poco_detect_server($profile));
 	}
 
-	if (($server_url == '') AND ($gcontacts[0]["server_url"] != "")) {
+	if (($server_url == '') && ($gcontacts[0]["server_url"] != "")) {
 		$server_url = $gcontacts[0]["server_url"];
 	}
 
-	if (!$force AND (($server_url == '') OR ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"]))) {
+	if (!$force && (($server_url == '') || ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"]))) {
 		$server_url = normalise_link(poco_detect_server($profile));
 	}
 
@@ -519,7 +519,7 @@ function poco_last_updated($profile, $force = false) {
 	}
 
 	// noscrape is really fast so we don't cache the call.
-	if (($server_url != "") AND ($gcontacts[0]["nick"] != "")) {
+	if (($server_url != "") && ($gcontacts[0]["nick"] != "")) {
 
 		//  Use noscrape if possible
 		$server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", dbesc(normalise_link($server_url)));
@@ -527,7 +527,7 @@ function poco_last_updated($profile, $force = false) {
 		if ($server) {
 			$noscraperet = z_fetch_url($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 
-			if ($noscraperet["success"] AND ($noscraperet["body"] != "")) {
+			if ($noscraperet["success"] && ($noscraperet["body"] != "")) {
 
 				$noscrape = json_decode($noscraperet["body"], true);
 
@@ -591,7 +591,7 @@ function poco_last_updated($profile, $force = false) {
 	}
 
 	// If we only can poll the feed, then we only do this once a while
-	if (!$force AND !poco_do_update($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"], $gcontacts[0]["last_contact"])) {
+	if (!$force && !poco_do_update($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"], $gcontacts[0]["last_contact"])) {
 		logger("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", LOGGER_DEBUG);
 
 		update_gcontact($contact);
@@ -602,8 +602,8 @@ function poco_last_updated($profile, $force = false) {
 
 	// Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 	// Then check the other link and delete this one
-	if (($data["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($profile) AND
-		(normalise_link($profile) == normalise_link($data["alias"])) AND
+	if (($data["network"] == NETWORK_OSTATUS) && poco_alternate_ostatus_url($profile) &&
+		(normalise_link($profile) == normalise_link($data["alias"])) &&
 		(normalise_link($profile) != normalise_link($data["url"]))) {
 
 		// Delete the old entry
@@ -627,7 +627,7 @@ function poco_last_updated($profile, $force = false) {
 		return false;
 	}
 
-	if (($data["poll"] == "") OR (in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
+	if (($data["poll"] == "") || (in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
 		q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 			dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 
@@ -715,24 +715,24 @@ function poco_do_update($created, $updated, $last_failure,  $last_contact) {
 		return false;
 
 	// If the last contact was less than a week ago and the last failure is older than a week then don't update
-	//if ((($now - $contact_time) < (60 * 60 * 24 * 7)) AND ($contact_time > $failure_time))
+	//if ((($now - $contact_time) < (60 * 60 * 24 * 7)) && ($contact_time > $failure_time))
 	//	return false;
 
 	// If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
-	if ((($now - $contact_time) > (60 * 60 * 24 * 7)) AND (($now - $created_time) > (60 * 60 * 24 * 7)) AND (($now - $failure_time) < (60 * 60 * 24 * 7)))
+	if ((($now - $contact_time) > (60 * 60 * 24 * 7)) && (($now - $created_time) > (60 * 60 * 24 * 7)) && (($now - $failure_time) < (60 * 60 * 24 * 7)))
 		return false;
 
 	// If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
-	if ((($now - $contact_time) > (60 * 60 * 24 * 30)) AND (($now - $created_time) > (60 * 60 * 24 * 30)) AND (($now - $failure_time) < (60 * 60 * 24 * 30)))
+	if ((($now - $contact_time) > (60 * 60 * 24 * 30)) && (($now - $created_time) > (60 * 60 * 24 * 30)) && (($now - $failure_time) < (60 * 60 * 24 * 30)))
 		return false;
 
 	return true;
 }
 
 function poco_to_boolean($val) {
-	if (($val == "true") OR ($val == 1))
+	if (($val == "true") || ($val == 1))
 		return(true);
-	if (($val == "false") OR ($val == 0))
+	if (($val == "false") || ($val == 0))
 		return(false);
 
 	return ($val);
@@ -823,7 +823,7 @@ function poco_fetch_nodeinfo($server_url) {
 
 	$server['register_policy'] = REGISTER_CLOSED;
 
-	if (is_bool($nodeinfo->openRegistrations) AND $nodeinfo->openRegistrations) {
+	if (is_bool($nodeinfo->openRegistrations) && $nodeinfo->openRegistrations) {
 		$server['register_policy'] = REGISTER_OPEN;
 	}
 
@@ -975,7 +975,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 		$info = $servers[0]["info"];
 		$register_policy = $servers[0]["register_policy"];
 
-		if (!$force AND !poco_do_update($servers[0]["created"], "", $last_failure, $last_contact)) {
+		if (!$force && !poco_do_update($servers[0]["created"], "", $last_failure, $last_contact)) {
 			logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 			return ($last_contact >= $last_failure);
 		}
@@ -1007,7 +1007,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 
 	// Quit if there is a timeout.
 	// But we want to make sure to only quit if we are mostly sure that this server url fits.
-	if (dbm::is_result($servers) AND ($orig_server_url == $server_url) AND
+	if (dbm::is_result($servers) && ($orig_server_url == $server_url) &&
 		($serverret['errno'] == CURLE_OPERATION_TIMEDOUT)) {
 		logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
 		dba::p("UPDATE `gserver` SET `last_failure` = ? WHERE `nurl` = ?", datetime_convert(), normalise_link($server_url));
@@ -1016,7 +1016,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 
 	// Maybe the page is unencrypted only?
 	$xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
-	if (!$serverret["success"] OR ($serverret["body"] == "") OR (@sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
+	if (!$serverret["success"] || ($serverret["body"] == "") || (@sizeof($xmlobj) == 0) || !is_object($xmlobj)) {
 		$server_url = str_replace("https://", "http://", $server_url);
 
 		// We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
@@ -1032,7 +1032,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 		$xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
 	}
 
-	if (!$serverret["success"] OR ($serverret["body"] == "") OR (sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
+	if (!$serverret["success"] || ($serverret["body"] == "") || (sizeof($xmlobj) == 0) || !is_object($xmlobj)) {
 		// Workaround for bad configured servers (known nginx problem)
 		if (!in_array($serverret["debug"]["http_code"], array("403", "404"))) {
 			$failure = true;
@@ -1071,7 +1071,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 		// Test for Diaspora, Hubzilla, Mastodon or older Friendica servers
 		$serverret = z_fetch_url($server_url);
 
-		if (!$serverret["success"] OR ($serverret["body"] == "")) {
+		if (!$serverret["success"] || ($serverret["body"] == "")) {
 			$failure = true;
 		} else {
 			$server = poco_detect_server_type($serverret["body"]);
@@ -1104,13 +1104,13 @@ function poco_check_server($server_url, $network = "", $force = false) {
 		}
 	}
 
-	if (!$failure AND ($poco == "")) {
+	if (!$failure && ($poco == "")) {
 		// Test for Statusnet
 		// Will also return data for Friendica and GNU Social - but it will be overwritten later
 		// The "not implemented" is a special treatment for really, really old Friendica versions
 		$serverret = z_fetch_url($server_url."/api/statusnet/version.json");
-		if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
-			($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
+		if ($serverret["success"] && ($serverret["body"] != '{"error":"not implemented"}') &&
+			($serverret["body"] != '') && (strlen($serverret["body"]) < 30)) {
 			$platform = "StatusNet";
 			// Remove junk that some GNU Social servers return
 			$version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
@@ -1120,8 +1120,8 @@ function poco_check_server($server_url, $network = "", $force = false) {
 
 		// Test for GNU Social
 		$serverret = z_fetch_url($server_url."/api/gnusocial/version.json");
-		if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
-			($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
+		if ($serverret["success"] && ($serverret["body"] != '{"error":"not implemented"}') &&
+			($serverret["body"] != '') && (strlen($serverret["body"]) < 30)) {
 			$platform = "GNU Social";
 			// Remove junk that some GNU Social servers return
 			$version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
@@ -1131,7 +1131,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 
 		// Test for Mastodon
 		$serverret = z_fetch_url($server_url."/api/v1/instance");
-		if ($serverret["success"] AND ($serverret["body"] != '')) {
+		if ($serverret["success"] && ($serverret["body"] != '')) {
 			$data = json_decode($serverret["body"]);
 			if (isset($data->version)) {
 				$platform = "Mastodon";
@@ -1185,9 +1185,9 @@ function poco_check_server($server_url, $network = "", $force = false) {
 				$data->site->private = poco_to_boolean($data->site->private);
 				$data->site->inviteonly = poco_to_boolean($data->site->inviteonly);
 
-				if (!$data->site->closed AND !$data->site->private and $data->site->inviteonly)
+				if (!$data->site->closed && !$data->site->private and $data->site->inviteonly)
 					$register_policy = REGISTER_APPROVE;
-				elseif (!$data->site->closed AND !$data->site->private)
+				elseif (!$data->site->closed && !$data->site->private)
 					$register_policy = REGISTER_OPEN;
 				else
 					$register_policy = REGISTER_CLOSED;
@@ -1251,7 +1251,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 
 	// Check for noscrape
 	// Friendica servers could be detected as OStatus servers
-	if (!$failure AND in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS))) {
+	if (!$failure && in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS))) {
 		$serverret = z_fetch_url($server_url."/friendica/json");
 
 		if (!$serverret["success"])
@@ -1285,7 +1285,7 @@ function poco_check_server($server_url, $network = "", $force = false) {
 		}
 	}
 
-	if ($possible_failure AND !$failure) {
+	if ($possible_failure && !$failure) {
 		$failure = true;
 	}
 
@@ -1297,9 +1297,9 @@ function poco_check_server($server_url, $network = "", $force = false) {
 		$last_failure = $orig_last_failure;
 	}
 
-	if (($last_contact <= $last_failure) AND !$failure) {
+	if (($last_contact <= $last_failure) && !$failure) {
 		logger("Server ".$server_url." seems to be alive, but last contact wasn't set - could be a bug", LOGGER_DEBUG);
-	} else if (($last_contact >= $last_failure) AND $failure) {
+	} else if (($last_contact >= $last_failure) && $failure) {
 		logger("Server ".$server_url." seems to be dead, but last failure wasn't set - could be a bug", LOGGER_DEBUG);
 	}
 
@@ -1729,7 +1729,7 @@ function poco_discover_single_server($id) {
 				$success = poco_discover_server(json_decode($retdata["body"]));
 			}
 
-			if (!$success AND (get_config('system','poco_discovery') > 2)) {
+			if (!$success && (get_config('system','poco_discovery') > 2)) {
 				logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
 				poco_discover_server_users($data, $server);
 			}
@@ -1776,7 +1776,7 @@ function poco_discover($complete = false) {
 			logger('Update directory from server '.$server['url'].' with ID '.$server['id'], LOGGER_DEBUG);
 			proc_run(PRIORITY_LOW, "include/discover_poco.php", "update_server_directory", intval($server['id']));
 
-			if (!$complete AND (--$no_of_queries == 0)) {
+			if (!$complete && (--$no_of_queries == 0)) {
 				break;
 			}
 		}
@@ -1813,7 +1813,7 @@ function poco_discover_server_users($data, $server) {
 
 function poco_discover_server($data, $default_generation = 0) {
 
-	if (!isset($data->entry) OR !count($data->entry))
+	if (!isset($data->entry) || !count($data->entry))
 		return false;
 
 	$success = false;
@@ -1876,11 +1876,11 @@ function poco_discover_server($data, $default_generation = 0) {
 			$gender = $entry->gender;
 		}
 
-		if(isset($entry->generation) AND ($entry->generation > 0)) {
+		if(isset($entry->generation) && ($entry->generation > 0)) {
 			$generation = ++$entry->generation;
 		}
 
-		if(isset($entry->contactType) AND ($entry->contactType >= 0)) {
+		if(isset($entry->contactType) && ($entry->contactType >= 0)) {
 			$contact_type = $entry->contactType;
 		}
 
@@ -1930,7 +1930,7 @@ function poco_discover_server($data, $default_generation = 0) {
 function clean_contact_url($url) {
 	$parts = parse_url($url);
 
-	if (!isset($parts["scheme"]) OR !isset($parts["host"]))
+	if (!isset($parts["scheme"]) || !isset($parts["host"]))
 		return $url;
 
 	$new_url = $parts["scheme"]."://".$parts["host"];
@@ -1953,7 +1953,7 @@ function clean_contact_url($url) {
  * @param arr $contact contact array (called by reference)
  */
 function fix_alternate_contact_address(&$contact) {
-	if (($contact["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($contact["url"])) {
+	if (($contact["network"] == NETWORK_OSTATUS) && poco_alternate_ostatus_url($contact["url"])) {
 		$data = probe_url($contact["url"]);
 		if ($contact["network"] == NETWORK_OSTATUS) {
 			logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
@@ -2008,7 +2008,7 @@ function get_gcontact_id($contact) {
 			$last_failure = strtotime($r[0]["last_failure"]);
 			$last_contact_str = $r[0]["last_contact"];
 			$last_contact = strtotime($r[0]["last_contact"]);
-			$doprobing = (((time() - $last_contact) > (90 * 86400)) AND ((time() - $last_failure) > (90 * 86400)));
+			$doprobing = (((time() - $last_contact) > (90 * 86400)) && ((time() - $last_failure) > (90 * 86400)));
 		}
 	} else {
 		q("INSERT INTO `gcontact` (`name`, `nick`, `addr` , `network`, `url`, `nurl`, `photo`, `created`, `updated`, `location`, `about`, `hide`, `generation`)
@@ -2056,7 +2056,7 @@ function get_gcontact_id($contact) {
 function update_gcontact($contact) {
 
 	// Check for invalid "contact-type" value
-	if (isset($contact['contact-type']) AND (intval($contact['contact-type']) < 0)) {
+	if (isset($contact['contact-type']) && (intval($contact['contact-type']) < 0)) {
 		$contact['contact-type'] = 0;
 	}
 
@@ -2091,7 +2091,7 @@ function update_gcontact($contact) {
 
 	// assign all unassigned fields from the database entry
 	foreach ($fields AS $field => $data)
-		if (!isset($contact[$field]) OR ($contact[$field] == ""))
+		if (!isset($contact[$field]) || ($contact[$field] == ""))
 			$contact[$field] = $r[0][$field];
 
 	if (!isset($contact["hide"]))
@@ -2125,7 +2125,7 @@ function update_gcontact($contact) {
 	} else
 		$contact["server_url"] = normalise_link($contact["server_url"]);
 
-	if (($contact["addr"] == "") AND ($contact["server_url"] != "") AND ($contact["nick"] != "")) {
+	if (($contact["addr"] == "") && ($contact["server_url"] != "") && ($contact["nick"] != "")) {
 		$hostname = str_replace("http://", "", $contact["server_url"]);
 		$contact["addr"] = $contact["nick"]."@".$hostname;
 	}
@@ -2134,7 +2134,7 @@ function update_gcontact($contact) {
 	$update = false;
 	unset($fields["generation"]);
 
-	if ((($contact["generation"] > 0) AND ($contact["generation"] <= $r[0]["generation"])) OR ($r[0]["generation"] == 0)) {
+	if ((($contact["generation"] > 0) && ($contact["generation"] <= $r[0]["generation"])) || ($r[0]["generation"] == 0)) {
 		foreach ($fields AS $field => $data)
 			if ($contact[$field] != $r[0][$field]) {
 				logger("Difference for contact ".$contact["url"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
@@ -2240,7 +2240,7 @@ function update_gcontact_for_user($uid) {
 			"gender" => $r[0]["gender"], "keywords" => $r[0]["pub_keywords"],
 			"birthday" => $r[0]["dob"], "photo" => $r[0]["photo"],
 			"notify" => $r[0]["notify"], "url" => $r[0]["url"],
-			"hide" => ($r[0]["hidewall"] OR !$r[0]["net-publish"]),
+			"hide" => ($r[0]["hidewall"] || !$r[0]["net-publish"]),
 			"nick" => $r[0]["nickname"], "addr" => $addr,
 			"connect" => $addr, "server_url" => App::get_baseurl(),
 			"generation" => 1, "network" => NETWORK_DFRN);
diff --git a/include/spool_post.php b/include/spool_post.php
index 2b21e41965..b7b8de396a 100644
--- a/include/spool_post.php
+++ b/include/spool_post.php
@@ -13,7 +13,7 @@ function spool_post_run($argv, $argc) {
 
 	$path = get_spoolpath();
 
-	if (($path != '') AND is_writable($path)){
+	if (($path != '') && is_writable($path)){
 		if ($dh = opendir($path)) {
 			while (($file = readdir($dh)) !== false) {
 
@@ -30,7 +30,7 @@ function spool_post_run($argv, $argc) {
 				}
 
 				// We can't read or write the file? So we don't care about it.
-				if (!is_writable($fullfile) OR !is_readable($fullfile)) {
+				if (!is_writable($fullfile) || !is_readable($fullfile)) {
 					continue;
 				}
 
@@ -42,7 +42,7 @@ function spool_post_run($argv, $argc) {
 				}
 
 				// Skip if it doesn't seem to be an item array
-				if (!isset($arr['uid']) AND !isset($arr['uri']) AND !isset($arr['network'])) {
+				if (!isset($arr['uid']) && !isset($arr['uri']) && !isset($arr['network'])) {
 					continue;
 				}
 
diff --git a/include/tags.php b/include/tags.php
index 6067f3f4b9..ad66b02727 100644
--- a/include/tags.php
+++ b/include/tags.php
@@ -31,7 +31,7 @@ function create_tags_from_item($itemid) {
 
 	$tags = "";
 	foreach ($taglist as $tag)
-		if ((substr(trim($tag), 0, 1) == "#") OR (substr(trim($tag), 0, 1) == "@"))
+		if ((substr(trim($tag), 0, 1) == "#") || (substr(trim($tag), 0, 1) == "@"))
 			$tags .= " ".trim($tag);
 		else
 			$tags .= " #".trim($tag);
@@ -91,7 +91,7 @@ function create_tags_from_item($itemid) {
 			dbesc($link), dbesc($message["guid"]), dbesc($message["created"]), dbesc($message["received"]), intval($global));
 
 		// Search for mentions
-		if ((substr($tag, 0, 1) == '@') AND (strpos($link, $profile_base_friendica) OR strpos($link, $profile_base_diaspora))) {
+		if ((substr($tag, 0, 1) == '@') && (strpos($link, $profile_base_friendica) || strpos($link, $profile_base_diaspora))) {
 			$users = q("SELECT `uid` FROM `contact` WHERE self AND (`url` = '%s' OR `nurl` = '%s')", $link, $link);
 			foreach ($users AS $user) {
 				if ($user["uid"] == $message["uid"]) {
diff --git a/include/text.php b/include/text.php
index c9babba940..80c0d87e2e 100644
--- a/include/text.php
+++ b/include/text.php
@@ -287,7 +287,7 @@ function paginate_data(App $a, $count = null) {
 	$stripped = trim($stripped, '/');
 	$pagenum = $a->pager['page'];
 
-	if (($a->page_offset != '') AND !preg_match('/[?&].offset=/', $stripped)) {
+	if (($a->page_offset != '') && !preg_match('/[?&].offset=/', $stripped)) {
 		$stripped .= '&offset=' . urlencode($a->page_offset);
 	}
 
@@ -1265,8 +1265,8 @@ function redir_private_images($a, &$item)
 
 function put_item_in_cache(&$item, $update = false) {
 
-	if (($item["rendered-hash"] != hash("md5", $item["body"])) OR ($item["rendered-hash"] == "") OR
-		($item["rendered-html"] == "") OR get_config("system", "ignore_cache")) {
+	if (($item["rendered-hash"] != hash("md5", $item["body"])) || ($item["rendered-hash"] == "") ||
+		($item["rendered-html"] == "") || get_config("system", "ignore_cache")) {
 
 		// The function "redir_private_images" changes the body.
 		// I'm not sure if we should store it permanently, so we save the old value.
@@ -1279,7 +1279,7 @@ function put_item_in_cache(&$item, $update = false) {
 		$item["rendered-hash"] = hash("md5", $item["body"]);
 		$item["body"] = $body;
 
-		if ($update AND ($item["id"] != 0)) {
+		if ($update && ($item["id"] != 0)) {
 			q("UPDATE `item` SET `rendered-html` = '%s', `rendered-hash` = '%s' WHERE `id` = %d",
 				dbesc($item["rendered-html"]), dbesc($item["rendered-hash"]), intval($item["id"]));
 		}
@@ -1340,7 +1340,7 @@ function prepare_body(&$item,$attach = false, $preview = false) {
 	$update = (!local_user() and !remote_user() and ($item["uid"] == 0));
 
 	// Or update it if the current viewer is the intented viewer
-	if (($item["uid"] == local_user()) AND ($item["uid"] != 0))
+	if (($item["uid"] == local_user()) && ($item["uid"] != 0))
 		$update = true;
 
 	put_item_in_cache($item, $update);
diff --git a/include/threads.php b/include/threads.php
index b0ba546840..7a6305f85b 100644
--- a/include/threads.php
+++ b/include/threads.php
@@ -45,12 +45,12 @@ function add_shadow_thread($itemid) {
 	$item = $items[0];
 
 	// is it already a copy?
-	if (($itemid == 0) OR ($item['uid'] == 0)) {
+	if (($itemid == 0) || ($item['uid'] == 0)) {
 		return;
 	}
 
 	// Is it a visible public post?
-	if (!$item["visible"] OR $item["deleted"] OR $item["moderated"] OR $item["private"]) {
+	if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
 		return;
 	}
 
@@ -86,8 +86,8 @@ function add_shadow_thread($itemid) {
 
 	$item = q("SELECT * FROM `item` WHERE `id` = %d", intval($itemid));
 
-	if (count($item) AND ($item[0]["allow_cid"] == '')  AND ($item[0]["allow_gid"] == '') AND
-		($item[0]["deny_cid"] == '') AND ($item[0]["deny_gid"] == '')) {
+	if (count($item) && ($item[0]["allow_cid"] == '')  && ($item[0]["allow_gid"] == '') &&
+		($item[0]["deny_cid"] == '') && ($item[0]["deny_gid"] == '')) {
 
 		$r = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `uid` = 0 LIMIT 1",
 			dbesc($item['uri']));
diff --git a/include/update_gcontact.php b/include/update_gcontact.php
index d283bd2689..97c825352e 100644
--- a/include/update_gcontact.php
+++ b/include/update_gcontact.php
@@ -40,16 +40,16 @@ function update_gcontact_run(&$argv, &$argc) {
 		return;
 	}
 
-	if (($data["name"] == "") AND ($r[0]['name'] != ""))
+	if (($data["name"] == "") && ($r[0]['name'] != ""))
 		$data["name"] = $r[0]['name'];
 
-	if (($data["nick"] == "") AND ($r[0]['nick'] != ""))
+	if (($data["nick"] == "") && ($r[0]['nick'] != ""))
 		$data["nick"] = $r[0]['nick'];
 
-	if (($data["addr"] == "") AND ($r[0]['addr'] != ""))
+	if (($data["addr"] == "") && ($r[0]['addr'] != ""))
 		$data["addr"] = $r[0]['addr'];
 
-	if (($data["photo"] == "") AND ($r[0]['photo'] != ""))
+	if (($data["photo"] == "") && ($r[0]['photo'] != ""))
 		$data["photo"] = $r[0]['photo'];
 
 
diff --git a/include/xml.php b/include/xml.php
index 9f7de8f33e..a9f4679b48 100644
--- a/include/xml.php
+++ b/include/xml.php
@@ -51,7 +51,7 @@ class xml {
 		}
 
 		foreach($array as $key => $value) {
-			if (!isset($element) AND isset($xml)) {
+			if (!isset($element) && isset($xml)) {
 				$element = $xml;
 			}
 
@@ -67,7 +67,7 @@ class xml {
 			}
 
 			$element_parts = explode(":", $key);
-			if ((count($element_parts) > 1) AND isset($namespaces[$element_parts[0]])) {
+			if ((count($element_parts) > 1) && isset($namespaces[$element_parts[0]])) {
 				$namespace = $namespaces[$element_parts[0]];
 			} elseif (isset($namespaces[""])) {
 				$namespace = $namespaces[""];
@@ -76,18 +76,18 @@ class xml {
 			}
 
 			// Remove undefined namespaces from the key
-			if ((count($element_parts) > 1) AND is_null($namespace)) {
+			if ((count($element_parts) > 1) && is_null($namespace)) {
 				$key = $element_parts[1];
 			}
 
 			if (substr($key, 0, 11) == "@attributes") {
-				if (!isset($element) OR !is_array($value)) {
+				if (!isset($element) || !is_array($value)) {
 					continue;
 				}
 
 				foreach ($value as $attr_key => $attr_value) {
 					$element_parts = explode(":", $attr_key);
-					if ((count($element_parts) > 1) AND isset($namespaces[$element_parts[0]])) {
+					if ((count($element_parts) > 1) && isset($namespaces[$element_parts[0]])) {
 						$namespace = $namespaces[$element_parts[0]];
 					} else {
 						$namespace = NULL;
@@ -399,7 +399,7 @@ class xml {
 
 	/**
 	 * @brief Delete a node in a XML object
-	 * 
+	 *
 	 * @param object $doc XML document
 	 * @param string $node Node name
 	 */
diff --git a/index.php b/index.php
index 2b26eb90f0..9ddb47efc6 100644
--- a/index.php
+++ b/index.php
@@ -59,15 +59,15 @@ if (!$install) {
 
 	Config::load();
 
-	if ($a->max_processes_reached() OR $a->maxload_reached()) {
+	if ($a->max_processes_reached() || $a->maxload_reached()) {
 		header($_SERVER["SERVER_PROTOCOL"] . ' 503 Service Temporarily Unavailable');
 		header('Retry-After: 120');
 		header('Refresh: 120; url=' . App::get_baseurl() . "/" . $a->query_string);
 		die("System is currently unavailable. Please try again later");
 	}
 
-	if (get_config('system', 'force_ssl') AND ($a->get_scheme() == "http") AND
-		(intval(get_config('system', 'ssl_policy')) == SSL_POLICY_FULL) AND
+	if (get_config('system', 'force_ssl') && ($a->get_scheme() == "http") &&
+		(intval(get_config('system', 'ssl_policy')) == SSL_POLICY_FULL) &&
 		(substr(App::get_baseurl(), 0, 8) == "https://")) {
 		header("HTTP/1.1 302 Moved Temporarily");
 		header("Location: " . App::get_baseurl() . "/" . $a->query_string);
@@ -128,7 +128,7 @@ if ((x($_SESSION,'language')) && ($_SESSION['language'] !== $lang)) {
 if ((x($_GET,'zrl')) && (!$install && !$maintenance)) {
 	// Only continue when the given profile link seems valid
 	// Valid profile links contain a path with "/profile/" and no query parameters
-	if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") AND
+	if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
 		strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
 		$_SESSION['my_url'] = $_GET['zrl'];
 		$a->query_string = preg_replace('/[\?&]zrl=(.*?)([\?&]|$)/is','',$a->query_string);
@@ -245,7 +245,7 @@ if (strlen($a->module)) {
 	}
 
 	// Compatibility with the Firefox App
-	if (($a->module == "users") AND ($a->cmd == "users/sign_in")) {
+	if (($a->module == "users") && ($a->cmd == "users/sign_in")) {
 		$a->module = "login";
 	}
 
@@ -450,7 +450,7 @@ if (!$a->theme['stylesheet']) {
 $a->page['htmlhead'] = str_replace('{{$stylesheet}}',$stylesheet,$a->page['htmlhead']);
 //$a->page['htmlhead'] = replace_macros($a->page['htmlhead'], array('$stylesheet' => $stylesheet));
 
-if (isset($_GET["mode"]) AND (($_GET["mode"] == "raw") OR ($_GET["mode"] == "minimal"))) {
+if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
 	$doc = new DOMDocument();
 
 	$target = new DOMDocument();
@@ -473,7 +473,7 @@ if (isset($_GET["mode"]) AND (($_GET["mode"] == "raw") OR ($_GET["mode"] == "min
 	}
 }
 
-if (isset($_GET["mode"]) AND ($_GET["mode"] == "raw")) {
+if (isset($_GET["mode"]) && ($_GET["mode"] == "raw")) {
 
 	header("Content-type: text/html; charset=utf-8");
 
diff --git a/mod/admin.php b/mod/admin.php
index d9684d6a4f..98558a6de4 100644
--- a/mod/admin.php
+++ b/mod/admin.php
@@ -770,7 +770,7 @@ function admin_page_site_post(App $a) {
 	$worker_frontend	=	((x($_POST,'worker_frontend'))		? True						: False);
 
 	// Has the directory url changed? If yes, then resubmit the existing profiles there
-	if ($global_directory != Config::get('system', 'directory') AND ($global_directory != '')) {
+	if ($global_directory != Config::get('system', 'directory') && ($global_directory != '')) {
 		Config::set('system', 'directory', $global_directory);
 		proc_run(PRIORITY_LOW, 'include/directory.php');
 	}
@@ -936,7 +936,7 @@ function admin_page_site(App $a) {
 	/* Installed langs */
 	$lang_choices = get_available_languages();
 
-	if (strlen(get_config('system','directory_submit_url')) AND
+	if (strlen(get_config('system','directory_submit_url')) &&
 		!strlen(get_config('system','directory'))) {
 			set_config('system','directory', dirname(get_config('system','directory_submit_url')));
 			del_config('system','directory_submit_url');
@@ -958,7 +958,7 @@ function admin_page_site(App $a) {
 			$f = basename($file);
 
 			// Only show allowed themes here
-			if (($allowed_theme_list != '') AND !strstr($allowed_theme_list, $f)) {
+			if (($allowed_theme_list != '') && !strstr($allowed_theme_list, $f)) {
 				continue;
 			}
 
@@ -1183,7 +1183,7 @@ function admin_page_dbsync(App $a) {
 		goaway('admin/dbsync');
 	}
 
-	if (($a->argc > 2) AND (intval($a->argv[2]) OR ($a->argv[2] === 'check'))) {
+	if (($a->argc > 2) && (intval($a->argv[2]) || ($a->argv[2] === 'check'))) {
 		require_once("include/dbstructure.php");
 		$retval = update_structure(false, true);
 		if (!$retval) {
@@ -1663,7 +1663,7 @@ function admin_page_plugins(App $a) {
 				$show_plugin = true;
 
 				// If the addon is unsupported, then only show it, when it is enabled
-				if ((strtolower($info["status"]) == "unsupported") AND !in_array($id,  $a->plugins)) {
+				if ((strtolower($info["status"]) == "unsupported") && !in_array($id,  $a->plugins)) {
 					$show_plugin = false;
 				}
 
@@ -1801,7 +1801,7 @@ function admin_page_themes(App $a) {
 			$is_supported = 1-(intval(file_exists($file.'/unsupported')));
 			$is_allowed = intval(in_array($f,$allowed_themes));
 
-			if ($is_allowed OR $is_supported OR get_config("system", "show_unsupported_themes")) {
+			if ($is_allowed || $is_supported || get_config("system", "show_unsupported_themes")) {
 				$themes[] = array('name' => $f, 'experimental' => $is_experimental, 'supported' => $is_supported, 'allowed' => $is_allowed);
 			}
 		}
diff --git a/mod/community.php b/mod/community.php
index 5c71667bdc..b1995c7002 100644
--- a/mod/community.php
+++ b/mod/community.php
@@ -68,14 +68,14 @@ function community_content(App $a, $update = 0) {
 				}
 				$previousauthor = $item["author-link"];
 
-				if (($numposts < $maxpostperauthor) AND (sizeof($s) < $a->pager['itemspage'])) {
+				if (($numposts < $maxpostperauthor) && (sizeof($s) < $a->pager['itemspage'])) {
 					$s[] = $item;
 				}
 			}
 			if ((sizeof($s) < $a->pager['itemspage'])) {
 				$r = community_getitems($a->pager['start'] + ($count * $a->pager['itemspage']), $a->pager['itemspage']);
 			}
-		} while ((sizeof($s) < $a->pager['itemspage']) AND (++$count < 50) AND (sizeof($r) > 0));
+		} while ((sizeof($s) < $a->pager['itemspage']) && (++$count < 50) && (sizeof($r) > 0));
 	} else {
 		$s = $r;
 	}
diff --git a/mod/contacts.php b/mod/contacts.php
index 30b8dde20e..8ba8e866de 100644
--- a/mod/contacts.php
+++ b/mod/contacts.php
@@ -17,7 +17,7 @@ function contacts_init(App $a) {
 
 	$contact_id = 0;
 
-	if((($a->argc == 2) && intval($a->argv[1])) OR (($a->argc == 3) && intval($a->argv[1]) && ($a->argv[2] == "posts"))) {
+	if((($a->argc == 2) && intval($a->argv[1])) || (($a->argc == 3) && intval($a->argv[1]) && ($a->argv[2] == "posts"))) {
 		$contact_id = intval($a->argv[1]);
 		$r = q("SELECT * FROM `contact` WHERE `uid` = %d and `id` = %d LIMIT 1",
 			intval(local_user()),
@@ -42,7 +42,7 @@ function contacts_init(App $a) {
 	if ($contact_id) {
 		$a->data['contact'] = $r[0];
 
-		if (($a->data['contact']['network'] != "") AND ($a->data['contact']['network'] != NETWORK_DFRN)) {
+		if (($a->data['contact']['network'] != "") && ($a->data['contact']['network'] != NETWORK_DFRN)) {
 			$networkname = format_network_name($a->data['contact']['network'],$a->data['contact']['url']);
 		} else {
 			$networkname = '';
@@ -266,7 +266,7 @@ function _contact_update_profile($contact_id) {
 	$data = Probe::uri($r[0]["url"], "", 0, false);
 
 	// "Feed" or "Unknown" is mostly a sign of communication problems
-	if ((in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM))) AND ($data["network"] != $r[0]["network"]))
+	if ((in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM))) && ($data["network"] != $r[0]["network"]))
 		return;
 
 	$updatefields = array("name", "nick", "url", "addr", "batch", "notify", "poll", "request", "confirm",
@@ -281,14 +281,14 @@ function _contact_update_profile($contact_id) {
 	}
 
 	foreach($updatefields AS $field)
-		if (isset($data[$field]) AND ($data[$field] != ""))
+		if (isset($data[$field]) && ($data[$field] != ""))
 			$update[$field] = $data[$field];
 
 	$update["nurl"] = normalise_link($data["url"]);
 
 	$query = "";
 
-	if (isset($data["priority"]) AND ($data["priority"] != 0))
+	if (isset($data["priority"]) && ($data["priority"] != 0))
 		$query = "`priority` = ".intval($data["priority"]);
 
 	foreach($update AS $key => $value) {
@@ -573,7 +573,7 @@ function contacts_content(App $a) {
 		if ($contact['network'] == NETWORK_DFRN)
 			$profile_select = contact_profile_assign($contact['profile-id'],(($contact['network'] !== NETWORK_DFRN) ? true : false));
 
-		if (in_array($contact['network'], array(NETWORK_DIASPORA, NETWORK_OSTATUS)) AND
+		if (in_array($contact['network'], array(NETWORK_DIASPORA, NETWORK_OSTATUS)) &&
 			($contact['rel'] == CONTACT_IS_FOLLOWER))
 			$follow = App::get_baseurl(true)."/follow?url=".urlencode($contact["url"]);
 
diff --git a/mod/dfrn_request.php b/mod/dfrn_request.php
index 4efb4119e1..0050decee1 100644
--- a/mod/dfrn_request.php
+++ b/mod/dfrn_request.php
@@ -626,7 +626,7 @@ function dfrn_request_post(App $a) {
 			);
 			// NOTREACHED
 			// END $network === NETWORK_DFRN
-		} elseif (($network != NETWORK_PHANTOM) AND ($url != "")) {
+		} elseif (($network != NETWORK_PHANTOM) && ($url != "")) {
 
 			/*
 			 *
@@ -693,7 +693,7 @@ function dfrn_request_content(App $a) {
 		$confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 
 		// Checking fastlane for validity
-		if (x($_SESSION, "fastlane") AND (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
+		if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
 			$_POST["dfrn_url"] = $dfrn_url;
 			$_POST["confirm_key"] = $confirm_key;
 			$_POST["localconfirm"] = 1;
@@ -813,9 +813,9 @@ function dfrn_request_content(App $a) {
 
 		// At first look if an address was provided
 		// Otherwise take the local address
-		if (x($_GET,'addr') AND ($_GET['addr'] != "")) {
+		if (x($_GET,'addr') && ($_GET['addr'] != "")) {
 			$myaddr = hex2bin($_GET['addr']);
-		} elseif (x($_GET,'address') AND ($_GET['address'] != "")) {
+		} elseif (x($_GET,'address') && ($_GET['address'] != "")) {
 			$myaddr = $_GET['address'];
 		} elseif (local_user()) {
 			if (strlen($a->path)) {
diff --git a/mod/dirfind.php b/mod/dirfind.php
index a64a804ba8..884eca9a66 100644
--- a/mod/dirfind.php
+++ b/mod/dirfind.php
@@ -37,7 +37,7 @@ function dirfind_content(App $a, $prefix = "") {
 	if (strpos($search,'@') === 0) {
 		$search = substr($search,1);
 		$header = sprintf( t('People Search - %s'), $search);
-		if ((valid_email($search) AND validate_email($search)) OR
+		if ((valid_email($search) && validate_email($search)) ||
 			(substr(normalise_link($search), 0, 7) == "http://")) {
 			$user_data = probe_url($search);
 			$discover_user = (in_array($user_data["network"], array(NETWORK_DFRN, NETWORK_OSTATUS, NETWORK_DIASPORA)));
@@ -75,7 +75,7 @@ function dirfind_content(App $a, $prefix = "") {
 			$j->results[] = $objresult;
 
 			// Add the contact to the global contacts if it isn't already in our system
-			if (($contact["cid"] == 0) AND ($contact["zid"] == 0) AND ($contact["gid"] == 0)) {
+			if (($contact["cid"] == 0) && ($contact["zid"] == 0) && ($contact["gid"] == 0)) {
 				update_gcontact($user_data);
 			}
 		} elseif ($local) {
diff --git a/mod/display.php b/mod/display.php
index ca6809eba1..c4cf381e93 100644
--- a/mod/display.php
+++ b/mod/display.php
@@ -59,7 +59,7 @@ function display_init(App $a) {
 					WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
 						AND `id` = %d", $r[0]["parent"]);
 			}
-			if (($itemuid != local_user()) AND local_user()) {
+			if (($itemuid != local_user()) && local_user()) {
 				// Do we know this contact but we haven't got this item?
 				// Copy the wohle thread to our local storage so that we can interact.
 				// We really should change this need for the future since it scales very bad.
@@ -129,11 +129,11 @@ function display_fetchauthor($a, $item) {
 
 	// Skip if it isn't a pure repeated messages
 	// Does it start with a share?
-	if (!$skip AND strpos($body, "[share") > 0) {
+	if (!$skip && strpos($body, "[share") > 0) {
 		$skip = true;
 	}
 	// Does it end with a share?
-	if (!$skip AND (strlen($body) > (strrpos($body, "[/share]") + 8))) {
+	if (!$skip && (strlen($body) > (strrpos($body, "[/share]") + 8))) {
 		$skip = true;
 	}
 	if (!$skip) {
@@ -265,7 +265,7 @@ function display_content(App $a, $update = 0) {
 		}
 	}
 
-	if ($item_id AND !is_numeric($item_id)) {
+	if ($item_id && !is_numeric($item_id)) {
 		$r = qu("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 			dbesc($item_id), intval($a->profile['uid']));
 		if (dbm::is_result($r)) {
diff --git a/mod/events.php b/mod/events.php
index 876727608d..0fdec5cbe4 100644
--- a/mod/events.php
+++ b/mod/events.php
@@ -436,7 +436,7 @@ function events_content(App $a) {
 			$sh_checked = (($orig_event['allow_cid'] === '<' . local_user() . '>' && (! $orig_event['allow_gid']) && (! $orig_event['deny_cid']) && (! $orig_event['deny_gid'])) ? '' : ' checked="checked" ');
 		}
 
-		if ($cid OR ($mode !== 'new')) {
+		if ($cid || ($mode !== 'new')) {
 			$sh_checked .= ' disabled="disabled" ';
 		}
 
diff --git a/mod/fetch.php b/mod/fetch.php
index 0afd7af107..6dd6966d9e 100644
--- a/mod/fetch.php
+++ b/mod/fetch.php
@@ -11,7 +11,7 @@ require_once("include/xml.php");
 
 function fetch_init(App $a) {
 
-	if (($a->argc != 3) OR (!in_array($a->argv[1], array("post", "status_message", "reshare")))) {
+	if (($a->argc != 3) || (!in_array($a->argv[1], array("post", "status_message", "reshare")))) {
 		header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
 		killme();
 	}
diff --git a/mod/follow.php b/mod/follow.php
index 45e017f088..8d5cb99126 100644
--- a/mod/follow.php
+++ b/mod/follow.php
@@ -37,14 +37,14 @@ function follow_content(App $a) {
 
 	$ret = probe_url($url);
 
-	if (($ret["network"] == NETWORK_DIASPORA) AND !get_config('system','diaspora_enabled')) {
+	if (($ret["network"] == NETWORK_DIASPORA) && !get_config('system','diaspora_enabled')) {
 		notice( t("Diaspora support isn't enabled. Contact can't be added.") . EOL);
 		$submit = "";
 		//goaway($_SESSION['return_url']);
 		// NOTREACHED
 	}
 
-	if (($ret["network"] == NETWORK_OSTATUS) AND get_config('system','ostatus_disabled')) {
+	if (($ret["network"] == NETWORK_OSTATUS) && get_config('system','ostatus_disabled')) {
 		notice( t("OStatus support is disabled. Contact can't be added.") . EOL);
 		$submit = "";
 		//goaway($_SESSION['return_url']);
diff --git a/mod/item.php b/mod/item.php
index f696a96a7e..7e6d092711 100644
--- a/mod/item.php
+++ b/mod/item.php
@@ -139,8 +139,8 @@ function item_post(App $a) {
 
 			// If the contact id doesn't fit with the contact, then set the contact to null
 			$thrparent = q("SELECT `author-link`, `network` FROM `item` WHERE `uri` = '%s' LIMIT 1", dbesc($thr_parent));
-			if (dbm::is_result($thrparent) AND ($thrparent[0]["network"] === NETWORK_OSTATUS)
-				AND (normalise_link($parent_contact["url"]) != normalise_link($thrparent[0]["author-link"]))) {
+			if (dbm::is_result($thrparent) && ($thrparent[0]["network"] === NETWORK_OSTATUS)
+				&& (normalise_link($parent_contact["url"]) != normalise_link($thrparent[0]["author-link"]))) {
 				$parent_contact = get_contact_details_by_url($thrparent[0]["author-link"]);
 
 				if (!isset($parent_contact["nick"])) {
@@ -175,7 +175,7 @@ function item_post(App $a) {
 	$object      = ((x($_REQUEST, 'object'))      ? $_REQUEST['object']              : '');
 
 	// Check for multiple posts with the same message id (when the post was created via API)
-	if (($message_id != '') AND ($profile_uid != 0)) {
+	if (($message_id != '') && ($profile_uid != 0)) {
 		$r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 			dbesc($message_id),
 			intval($profile_uid)
@@ -309,8 +309,8 @@ function item_post(App $a) {
 
 			// for non native networks use the network of the original post as network of the item
 			if (($parent_item['network'] != NETWORK_DIASPORA)
-				AND ($parent_item['network'] != NETWORK_OSTATUS)
-				AND ($network == "")) {
+				&& ($parent_item['network'] != NETWORK_OSTATUS)
+				&& ($network == "")) {
 				$network = $parent_item['network'];
 			}
 
@@ -504,7 +504,7 @@ function item_post(App $a) {
 
 	$bookmark = 0;
 	$data = get_attachment_data($body);
-	if (preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $body, $match, PREG_SET_ORDER) OR isset($data["type"])) {
+	if (preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $body, $match, PREG_SET_ORDER) || isset($data["type"])) {
 		$objecttype = ACTIVITY_OBJ_BOOKMARK;
 		$bookmark = 1;
 	}
@@ -543,7 +543,7 @@ function item_post(App $a) {
 	 * add a statusnet style reply tag if the original post was from there
 	 * and we are replying, and there isn't one already
 	 */
-	if ($parent AND ($parent_contact['network'] == NETWORK_OSTATUS)) {
+	if ($parent && ($parent_contact['network'] == NETWORK_OSTATUS)) {
 		$contact = '@[url=' . $parent_contact['url'] . ']' . $parent_contact['nick'] . '[/url]';
 
 		if (!in_array($contact, $tags)) {
@@ -1226,7 +1226,7 @@ function handle_tag(App $a, &$body, &$inform, &$str_tags, $profile_uid, $tag, $n
 			}
 
 			// select someone by attag or nick and the name passed in the current network
-			if(!dbm::is_result($r) AND ($network != ""))
+			if(!dbm::is_result($r) && ($network != ""))
 				$r = q("SELECT `id`, `url`, `nick`, `name`, `alias`, `network` FROM `contact` WHERE `attag` = '%s' OR `nick` = '%s' AND `network` = '%s' AND `uid` = %d ORDER BY `attag` DESC LIMIT 1",
 						dbesc($name),
 						dbesc($name),
@@ -1235,7 +1235,7 @@ function handle_tag(App $a, &$body, &$inform, &$str_tags, $profile_uid, $tag, $n
 				);
 
 			//select someone from this user's contacts by name in the current network
-			if (!dbm::is_result($r) AND ($network != "")) {
+			if (!dbm::is_result($r) && ($network != "")) {
 				$r = q("SELECT `id`, `url`, `nick`, `name`, `alias`, `network` FROM `contact` WHERE `name` = '%s' AND `network` = '%s' AND `uid` = %d LIMIT 1",
 						dbesc($name),
 						dbesc($network),
@@ -1262,7 +1262,7 @@ function handle_tag(App $a, &$body, &$inform, &$str_tags, $profile_uid, $tag, $n
 		}
 
 		if (dbm::is_result($r)) {
-			if (strlen($inform) AND (isset($r[0]["notify"]) OR isset($r[0]["id"]))) {
+			if (strlen($inform) && (isset($r[0]["notify"]) || isset($r[0]["id"]))) {
 				$inform .= ',';
 			}
 
@@ -1275,14 +1275,14 @@ function handle_tag(App $a, &$body, &$inform, &$str_tags, $profile_uid, $tag, $n
 			$profile = $r[0]["url"];
 			$alias   = $r[0]["alias"];
 			$newname = $r[0]["nick"];
-			if (($newname == "") OR (($r[0]["network"] != NETWORK_OSTATUS) AND ($r[0]["network"] != NETWORK_TWITTER)
-				AND ($r[0]["network"] != NETWORK_STATUSNET) AND ($r[0]["network"] != NETWORK_APPNET))) {
+			if (($newname == "") || (($r[0]["network"] != NETWORK_OSTATUS) && ($r[0]["network"] != NETWORK_TWITTER)
+				&& ($r[0]["network"] != NETWORK_STATUSNET) && ($r[0]["network"] != NETWORK_APPNET))) {
 				$newname = $r[0]["name"];
 			}
 		}
 
 		//if there is an url for this persons profile
-		if (isset($profile) AND ($newname != "")) {
+		if (isset($profile) && ($newname != "")) {
 
 			$replaced = true;
 			// create profile link
diff --git a/mod/network.php b/mod/network.php
index 0d37d4d2e2..61db199d55 100644
--- a/mod/network.php
+++ b/mod/network.php
@@ -398,7 +398,7 @@ function network_content(App $a, $update = 0) {
 	}
 	set_pconfig(local_user(), 'network.view', 'net.selected', ($nets ? $nets : 'all'));
 
-	if(!$update AND !$rawmode) {
+	if(!$update && !$rawmode) {
 		$tabs = network_tabs($a);
 		$o .= $tabs;
 
@@ -459,7 +459,7 @@ function network_content(App $a, $update = 0) {
 	$sql_table = "`thread`";
 	$sql_parent = "`iid`";
 
-	if ($nouveau OR strlen($file) OR $update) {
+	if ($nouveau || strlen($file) || $update) {
 		$sql_table = "`item`";
 		$sql_parent = "`parent`";
 		$sql_post_table = " INNER JOIN `thread` ON `thread`.`iid` = `item`.`parent`";
diff --git a/mod/nodeinfo.php b/mod/nodeinfo.php
index 5d8e8f2a20..b0fcc09eda 100644
--- a/mod/nodeinfo.php
+++ b/mod/nodeinfo.php
@@ -25,12 +25,12 @@ function nodeinfo_init(App $a) {
 		killme();
 	}
 
-	if (($a->argc != 2) OR ($a->argv[1] != '1.0')) {
+	if (($a->argc != 2) || ($a->argv[1] != '1.0')) {
 		http_status_exit(404);
 		killme();
 	}
 
-	$smtp = (function_exists('imap_open') AND !Config::get('system', 'imap_disabled') AND !Config::get('system', 'dfrn_only'));
+	$smtp = (function_exists('imap_open') && !Config::get('system', 'imap_disabled') && !Config::get('system', 'dfrn_only'));
 
 	$nodeinfo = array();
 	$nodeinfo['version'] = '1.0';
@@ -74,7 +74,7 @@ function nodeinfo_init(App $a) {
 		if (plugin_enabled('appnet')) {
 			$nodeinfo['services']['inbound'][] = 'appnet';
 		}
-		if (plugin_enabled('appnet') OR plugin_enabled('buffer')) {
+		if (plugin_enabled('appnet') || plugin_enabled('buffer')) {
 			$nodeinfo['services']['outbound'][] = 'appnet';
 		}
 		if (plugin_enabled('blogger')) {
@@ -83,7 +83,7 @@ function nodeinfo_init(App $a) {
 		if (plugin_enabled('dwpost')) {
 			$nodeinfo['services']['outbound'][] = 'dreamwidth';
 		}
-		if (plugin_enabled('fbpost') OR plugin_enabled('buffer')) {
+		if (plugin_enabled('fbpost') || plugin_enabled('buffer')) {
 			$nodeinfo['services']['outbound'][] = 'facebook';
 		}
 		if (plugin_enabled('statusnet')) {
@@ -91,7 +91,7 @@ function nodeinfo_init(App $a) {
 			$nodeinfo['services']['outbound'][] = 'gnusocial';
 		}
 
-		if (plugin_enabled('gpluspost') OR plugin_enabled('buffer')) {
+		if (plugin_enabled('gpluspost') || plugin_enabled('buffer')) {
 			$nodeinfo['services']['outbound'][] = 'google';
 		}
 		if (plugin_enabled('ijpost')) {
@@ -123,7 +123,7 @@ function nodeinfo_init(App $a) {
 		if (plugin_enabled('tumblr')) {
 			$nodeinfo['services']['outbound'][] = 'tumblr';
 		}
-		if (plugin_enabled('twitter') OR plugin_enabled('buffer')) {
+		if (plugin_enabled('twitter') || plugin_enabled('buffer')) {
 			$nodeinfo['services']['outbound'][] = 'twitter';
 		}
 		if (plugin_enabled('wppost')) {
@@ -203,11 +203,11 @@ function nodeinfo_cron() {
 			$month = time() - (30 * 24 * 60 * 60);
 
 			foreach ($users AS $user) {
-				if ((strtotime($user['login_date']) > $halfyear) OR
+				if ((strtotime($user['login_date']) > $halfyear) ||
 					(strtotime($user['last-item']) > $halfyear)) {
 					++$active_users_halfyear;
 				}
-				if ((strtotime($user['login_date']) > $month) OR
+				if ((strtotime($user['login_date']) > $month) ||
 					(strtotime($user['last-item']) > $month)) {
 					++$active_users_monthly;
 				}
diff --git a/mod/noscrape.php b/mod/noscrape.php
index a269d7369a..814dc885cd 100644
--- a/mod/noscrape.php
+++ b/mod/noscrape.php
@@ -17,7 +17,7 @@ function noscrape_init(App $a) {
 
 	profile_load($a,$which,$profile);
 
-	if (!$a->profile['net-publish'] OR $a->profile['hidewall']) {
+	if (!$a->profile['net-publish'] || $a->profile['hidewall']) {
 		header('Content-type: application/json; charset=utf-8');
 		$json_info = array("hide" => true);
 		echo json_encode($json_info);
@@ -42,7 +42,7 @@ function noscrape_init(App $a) {
 		'tags'     => $keywords
 	);
 
-	if (is_array($a->profile) AND !$a->profile['hide-friends']) {
+	if (is_array($a->profile) && !$a->profile['hide-friends']) {
 		$r = q("SELECT `gcontact`.`updated` FROM `contact` INNER JOIN `gcontact` WHERE `gcontact`.`nurl` = `contact`.`nurl` AND `self` AND `uid` = %d LIMIT 1",
 			intval($a->profile['uid']));
 		if (dbm::is_result($r)) {
diff --git a/mod/photo.php b/mod/photo.php
index 7506834cf5..3c5fdd7be4 100644
--- a/mod/photo.php
+++ b/mod/photo.php
@@ -119,7 +119,7 @@ function photo_init(App $a) {
 				intval($resolution)
 			);
 
-			$public = (dbm::is_result($r)) AND ($r[0]['allow_cid'] == '') AND ($r[0]['allow_gid'] == '') AND ($r[0]['deny_cid']  == '') AND ($r[0]['deny_gid']  == '');
+			$public = (dbm::is_result($r)) && ($r[0]['allow_cid'] == '') && ($r[0]['allow_gid'] == '') && ($r[0]['deny_cid']  == '') && ($r[0]['deny_gid']  == '');
 
 			if (dbm::is_result($r)) {
 				$resolution = $r[0]['scale'];
diff --git a/mod/ping.php b/mod/ping.php
index 8ebf4add38..ad1d4019f0 100644
--- a/mod/ping.php
+++ b/mod/ping.php
@@ -330,10 +330,10 @@ function ping_init(App $a)
 
 		if (dbm::is_result($notifs)) {
 			// Are the nofications called from the regular process or via the friendica app?
-			$regularnotifications = (intval($_GET['uid']) AND intval($_GET['_']));
+			$regularnotifications = (intval($_GET['uid']) && intval($_GET['_']));
 
 			foreach ($notifs as $notif) {
-				if ($a->is_friendica_app() OR !$regularnotifications) {
+				if ($a->is_friendica_app() || !$regularnotifications) {
 					$notif['message'] = str_replace("{0}", $notif['name'], $notif['message']);
 				}
 
@@ -434,7 +434,7 @@ function ping_get_notifications($uid)
 			intval($offset)
 		);
 
-		if (!$r AND !$seen) {
+		if (!$r && !$seen) {
 			$seen = true;
 			$seensql = "";
 			$order = "DESC";
@@ -474,12 +474,12 @@ function ping_get_notifications($uid)
 
 			$notification["href"] = App::get_baseurl() . "/notify/view/" . $notification["id"];
 
-			if ($notification["visible"] AND !$notification["spam"] AND
-				!$notification["deleted"] AND !is_array($result[$notification["parent"]])) {
+			if ($notification["visible"] && !$notification["spam"] &&
+				!$notification["deleted"] && !is_array($result[$notification["parent"]])) {
 				$result[$notification["parent"]] = $notification;
 			}
 		}
-	} while ((count($result) < 50) AND !$quit);
+	} while ((count($result) < 50) && !$quit);
 
 	return($result);
 }
diff --git a/mod/poco.php b/mod/poco.php
index 97f518a1a5..5610190dc2 100644
--- a/mod/poco.php
+++ b/mod/poco.php
@@ -55,7 +55,7 @@ function poco_init(App $a) {
 		$cid = intval($a->argv[4]);
 	}
 
-	if (! $system_mode AND ! $global) {
+	if (! $system_mode && ! $global) {
 		$users = q("SELECT `user`.*,`profile`.`hide-friends` from user left join profile on `user`.`uid` = `profile`.`uid`
 			where `user`.`nickname` = '%s' and `profile`.`is-default` = 1 limit 1",
 			dbesc($user)
@@ -157,7 +157,7 @@ function poco_init(App $a) {
 	if (x($_GET, 'filtered')) {
 		$ret['filtered'] = false;
 	}
-	if (x($_GET, 'updatedSince') AND ! $global) {
+	if (x($_GET, 'updatedSince') && ! $global) {
 		$ret['updatedSince'] = false;
 	}
 	$ret['startIndex']   = (int) $startIndex;
@@ -207,21 +207,21 @@ function poco_init(App $a) {
 					}
 				}
 
-				if (($contact['about'] == "") AND isset($contact['pabout'])) {
+				if (($contact['about'] == "") && isset($contact['pabout'])) {
 					$contact['about'] = $contact['pabout'];
 				}
 				if ($contact['location'] == "") {
 					if (isset($contact['plocation'])) {
 						$contact['location'] = $contact['plocation'];
 					}
-					if (isset($contact['pregion']) AND ( $contact['pregion'] != "")) {
+					if (isset($contact['pregion']) && ( $contact['pregion'] != "")) {
 						if ($contact['location'] != "") {
 							$contact['location'] .= ", ";
 						}
 						$contact['location'] .= $contact['pregion'];
 					}
 
-					if (isset($contact['pcountry']) AND ( $contact['pcountry'] != "")) {
+					if (isset($contact['pcountry']) && ( $contact['pcountry'] != "")) {
 						if ($contact['location'] != "") {
 							$contact['location'] .= ", ";
 						}
@@ -229,10 +229,10 @@ function poco_init(App $a) {
 					}
 				}
 
-				if (($contact['gender'] == "") AND isset($contact['pgender'])) {
+				if (($contact['gender'] == "") && isset($contact['pgender'])) {
 					$contact['gender'] = $contact['pgender'];
 				}
-				if (($contact['keywords'] == "") AND isset($contact['pub_keywords'])) {
+				if (($contact['keywords'] == "") && isset($contact['pub_keywords'])) {
 					$contact['keywords'] = $contact['pub_keywords'];
 				}
 				if (isset($contact['account-type'])) {
@@ -306,7 +306,7 @@ function poco_init(App $a) {
 					if ($entry['network'] == NETWORK_STATUSNET) {
 						$entry['network'] = NETWORK_OSTATUS;
 					}
-					if (($entry['network'] == "") AND ($contact['self'])) {
+					if (($entry['network'] == "") && ($contact['self'])) {
 						$entry['network'] = NETWORK_DFRN;
 					}
 				}
diff --git a/mod/proxy.php b/mod/proxy.php
index 9311e55a96..a78f40dab2 100644
--- a/mod/proxy.php
+++ b/mod/proxy.php
@@ -48,15 +48,15 @@ function proxy_init(App $a) {
 	$basepath = $a->get_basepath();
 
 	// If the cache path isn't there, try to create it
-	if (!is_dir($basepath . '/proxy') AND is_writable($basepath)) {
+	if (!is_dir($basepath . '/proxy') && is_writable($basepath)) {
 		mkdir($basepath . '/proxy');
 	}
 
 	// Checking if caching into a folder in the webroot is activated and working
-	$direct_cache = (is_dir($basepath . '/proxy') AND is_writable($basepath . '/proxy'));
+	$direct_cache = (is_dir($basepath . '/proxy') && is_writable($basepath . '/proxy'));
 
 	// Look for filename in the arguments
-	if ((isset($a->argv[1]) OR isset($a->argv[2]) OR isset($a->argv[3])) AND !isset($_REQUEST['url'])) {
+	if ((isset($a->argv[1]) || isset($a->argv[2]) || isset($a->argv[3])) && !isset($_REQUEST['url'])) {
 		if (isset($a->argv[3])) {
 			$url = $a->argv[3];
 		} elseif (isset($a->argv[2])) {
@@ -65,7 +65,7 @@ function proxy_init(App $a) {
 			$url = $a->argv[1];
 		}
 
-		if (isset($a->argv[3]) AND ($a->argv[3] == 'thumb')) {
+		if (isset($a->argv[3]) && ($a->argv[3] == 'thumb')) {
 			$size = 200;
 		}
 
@@ -112,7 +112,7 @@ function proxy_init(App $a) {
 		$urlhash = 'pic:' . sha1($_REQUEST['url']);
 
 		$cachefile = get_cachefile(hash('md5', $_REQUEST['url']));
-		if ($cachefile != '' AND file_exists($cachefile)) {
+		if ($cachefile != '' && file_exists($cachefile)) {
 			$img_str = file_get_contents($cachefile);
 			$mime = image_type_to_mime_type(exif_imagetype($cachefile));
 
@@ -140,7 +140,7 @@ function proxy_init(App $a) {
 	$valid = true;
 	$r = array();
 
-	if (!$direct_cache AND ($cachefile == '')) {
+	if (!$direct_cache && ($cachefile == '')) {
 		$r = qu("SELECT * FROM `photo` WHERE `resource-id` = '%s' LIMIT 1", $urlhash);
 		if (dbm::is_result($r)) {
 			$img_str = $r[0]['data'];
@@ -163,7 +163,7 @@ function proxy_init(App $a) {
 		unlink($tempfile);
 
 		// If there is an error then return a blank image
-		if ((substr($a->get_curl_code(), 0, 1) == '4') OR (!$img_str)) {
+		if ((substr($a->get_curl_code(), 0, 1) == '4') || (!$img_str)) {
 			$img_str = file_get_contents('images/blank.png');
 			$mime = 'image/png';
 			$cachefile = ''; // Clear the cachefile so that the dummy isn't stored
@@ -173,7 +173,7 @@ function proxy_init(App $a) {
 				$img->scaleImage(10);
 				$img_str = $img->imageString();
 			}
-		} elseif ($mime != 'image/jpeg' AND !$direct_cache AND $cachefile == '') {
+		} elseif ($mime != 'image/jpeg' && !$direct_cache && $cachefile == '') {
 			$image = @imagecreatefromstring($img_str);
 
 			if ($image === FALSE) {
@@ -199,7 +199,7 @@ function proxy_init(App $a) {
 
 		} else {
 			$img = new Photo($img_str, $mime);
-			if ($img->is_valid() AND !$direct_cache AND ($cachefile == '')) {
+			if ($img->is_valid() && !$direct_cache && ($cachefile == '')) {
 				$img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
 			}
 		}
@@ -219,7 +219,7 @@ function proxy_init(App $a) {
 	// If there is a real existing directory then put the cache file there
 	// advantage: real file access is really fast
 	// Otherwise write in cachefile
-	if ($valid AND $direct_cache) {
+	if ($valid && $direct_cache) {
 		file_put_contents($basepath . '/proxy/' . proxy_url($_REQUEST['url'], true), $img_str_orig);
 		if ($sizetype != '') {
 			file_put_contents($basepath . '/proxy/' . proxy_url($_REQUEST['url'], true) . $sizetype, $img_str);
@@ -282,7 +282,7 @@ function proxy_url($url, $writemode = false, $size = '') {
 	$shortpath = hash('md5', $url);
 	$longpath = substr($shortpath, 0, 2);
 
-	if (is_dir($basepath) AND $writemode AND !is_dir($basepath . '/' . $longpath)) {
+	if (is_dir($basepath) && $writemode && !is_dir($basepath . '/' . $longpath)) {
 		mkdir($basepath . '/' . $longpath);
 		chmod($basepath . '/' . $longpath, 0777);
 	}
@@ -306,7 +306,7 @@ function proxy_url($url, $writemode = false, $size = '') {
 
 	// Too long files aren't supported by Apache
 	// Writemode in combination with long files shouldn't be possible
-	if ((strlen($proxypath) > 250) AND $writemode) {
+	if ((strlen($proxypath) > 250) && $writemode) {
 		return $shortpath;
 	} elseif (strlen($proxypath) > 250) {
 		return App::get_baseurl() . '/proxy/' . $shortpath . '?url=' . urlencode($url);
@@ -360,7 +360,7 @@ function proxy_parse_query($url) {
 function proxy_img_cb($matches) {
 	// if the picture seems to be from another picture cache then take the original source
 	$queryvar = proxy_parse_query($matches[2]);
-	if (($queryvar['url'] != '') AND (substr($queryvar['url'], 0, 4) == 'http')) {
+	if (($queryvar['url'] != '') && (substr($queryvar['url'], 0, 4) == 'http')) {
 		$matches[2] = urldecode($queryvar['url']);
 	}
 
diff --git a/mod/register.php b/mod/register.php
index 71c13ef396..d6343a2285 100644
--- a/mod/register.php
+++ b/mod/register.php
@@ -83,7 +83,7 @@ function register_post(App $a) {
 		}
 
 		// Only send a password mail when the password wasn't manually provided
-		if (!x($_POST,'password1') OR !x($_POST,'confirm')) {
+		if (!x($_POST,'password1') || !x($_POST,'confirm')) {
 			$res = send_register_open_eml(
 				$user['email'],
 				$a->config['sitename'],
diff --git a/mod/search.php b/mod/search.php
index fd1212ceec..3397c813bf 100644
--- a/mod/search.php
+++ b/mod/search.php
@@ -97,7 +97,7 @@ function search_content(App $a) {
 		return;
 	}
 
-	if(get_config('system','local_search') AND !local_user()) {
+	if(get_config('system','local_search') && !local_user()) {
 		http_status_exit(403,
 				array("title" => t("Public access denied."),
 					"description" => t("Only logged in users are permitted to perform a search.")));
@@ -106,7 +106,7 @@ function search_content(App $a) {
 		//return;
 	}
 
-	if (get_config('system','permit_crawling') AND !local_user()) {
+	if (get_config('system','permit_crawling') && !local_user()) {
 		// Default values:
 		// 10 requests are "free", after the 11th only a call per minute is allowed
 
@@ -122,7 +122,7 @@ function search_content(App $a) {
 		$result = Cache::get("remote_search:".$remote);
 		if (!is_null($result)) {
 			$resultdata = json_decode($result);
-			if (($resultdata->time > (time() - $crawl_permit_period)) AND ($resultdata->accesses > $free_crawls)) {
+			if (($resultdata->time > (time() - $crawl_permit_period)) && ($resultdata->accesses > $free_crawls)) {
 				http_status_exit(429,
 						array("title" => t("Too Many Requests"),
 							"description" => t("Only one search per minute is permitted for not logged in users.")));
diff --git a/mod/settings.php b/mod/settings.php
index 3357de09e5..6793d86a9c 100644
--- a/mod/settings.php
+++ b/mod/settings.php
@@ -462,13 +462,13 @@ function settings_post(App $a) {
 		$notify += intval($_POST['notify8']);
 
 	// Adjust the page flag if the account type doesn't fit to the page flag.
-	if (($account_type == ACCOUNT_TYPE_PERSON) AND !in_array($page_flags, array(PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE)))
+	if (($account_type == ACCOUNT_TYPE_PERSON) && !in_array($page_flags, array(PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE)))
 		$page_flags = PAGE_NORMAL;
-	elseif (($account_type == ACCOUNT_TYPE_ORGANISATION) AND !in_array($page_flags, array(PAGE_SOAPBOX)))
+	elseif (($account_type == ACCOUNT_TYPE_ORGANISATION) && !in_array($page_flags, array(PAGE_SOAPBOX)))
 		$page_flags = PAGE_SOAPBOX;
-	elseif (($account_type == ACCOUNT_TYPE_NEWS) AND !in_array($page_flags, array(PAGE_SOAPBOX)))
+	elseif (($account_type == ACCOUNT_TYPE_NEWS) && !in_array($page_flags, array(PAGE_SOAPBOX)))
 		$page_flags = PAGE_SOAPBOX;
-	elseif (($account_type == ACCOUNT_TYPE_COMMUNITY) AND !in_array($page_flags, array(PAGE_COMMUNITY, PAGE_PRVGROUP)))
+	elseif (($account_type == ACCOUNT_TYPE_COMMUNITY) && !in_array($page_flags, array(PAGE_COMMUNITY, PAGE_PRVGROUP)))
 		$page_flags = PAGE_COMMUNITY;
 
 	$email_changed = false;
@@ -1101,7 +1101,7 @@ function settings_content(App $a) {
 
 	// Set the account type to "Community" when the page is a community page but the account type doesn't fit
 	// This is only happening on the first visit after the update
-	if (in_array($a->user['page-flags'], array(PAGE_COMMUNITY, PAGE_PRVGROUP)) AND
+	if (in_array($a->user['page-flags'], array(PAGE_COMMUNITY, PAGE_PRVGROUP)) &&
 		($a->user['account-type'] != ACCOUNT_TYPE_COMMUNITY))
 		$a->user['account-type'] = ACCOUNT_TYPE_COMMUNITY;
 
diff --git a/mod/update_network.php b/mod/update_network.php
index 42172486d8..ec3494fb7c 100644
--- a/mod/update_network.php
+++ b/mod/update_network.php
@@ -15,7 +15,7 @@ function update_network_content(App $a) {
 	echo "<!DOCTYPE html><html><body>\r\n";
 	echo "<section>";
 
-	if (!get_pconfig($profile_uid, "system", "no_auto_update") OR ($_GET["force"] == 1)) {
+	if (!get_pconfig($profile_uid, "system", "no_auto_update") || ($_GET["force"] == 1)) {
 		$text = network_content($a, $profile_uid);
 	} else {
 		$text = "";
diff --git a/object/Item.php b/object/Item.php
index 9e8b4738e2..95c01a073e 100644
--- a/object/Item.php
+++ b/object/Item.php
@@ -158,7 +158,7 @@ class Item extends BaseObject {
 			$profile_link = zrl($profile_link);
 		}
 
-		if (!isset($item['author-thumb']) OR ($item['author-thumb'] == "")) {
+		if (!isset($item['author-thumb']) || ($item['author-thumb'] == "")) {
 			$author_contact = get_contact_details_by_url($item['author-link'], $conv->get_profile_owner());
 			if ($author_contact["thumb"]) {
 				$item['author-thumb'] = $author_contact["thumb"];
@@ -167,7 +167,7 @@ class Item extends BaseObject {
 			}
 		}
 
-		if (!isset($item['owner-thumb']) OR ($item['owner-thumb'] == "")) {
+		if (!isset($item['owner-thumb']) || ($item['owner-thumb'] == "")) {
 			$owner_contact = get_contact_details_by_url($item['owner-link'], $conv->get_profile_owner());
 			if ($owner_contact["thumb"]) {
 				$item['owner-thumb'] = $owner_contact["thumb"];
@@ -307,28 +307,28 @@ class Item extends BaseObject {
 		// Disable features that aren't available in several networks
 
 		/// @todo Add NETWORK_DIASPORA when it will pass this information
-		if (!in_array($item["item_network"], array(NETWORK_DFRN)) AND isset($buttons["dislike"])) {
+		if (!in_array($item["item_network"], array(NETWORK_DFRN)) && isset($buttons["dislike"])) {
 			unset($buttons["dislike"],$isevent);
 			$tagger = '';
 		}
 
-		if (($item["item_network"] == NETWORK_FEED) AND isset($buttons["like"])) {
+		if (($item["item_network"] == NETWORK_FEED) && isset($buttons["like"])) {
 			unset($buttons["like"]);
 		}
 
-		if (($item["item_network"] == NETWORK_MAIL) AND isset($buttons["like"])) {
+		if (($item["item_network"] == NETWORK_MAIL) && isset($buttons["like"])) {
 			unset($buttons["like"]);
 		}
 
  		// Diaspora isn't able to do likes on comments - but Hubzilla does
 		/// @todo When Diaspora will pass this information we will remove these lines
-		if (($item["item_network"] == NETWORK_DIASPORA) AND ($indent == 'comment') AND
-			!Diaspora::is_redmatrix($item["owner-link"]) AND isset($buttons["like"])) {
+		if (($item["item_network"] == NETWORK_DIASPORA) && ($indent == 'comment') &&
+			!Diaspora::is_redmatrix($item["owner-link"]) && isset($buttons["like"])) {
 			unset($buttons["like"]);
 		}
 
 		// Facebook can like comments - but it isn't programmed in the connector yet.
-		if (($item["item_network"] == NETWORK_FACEBOOK) AND ($indent == 'comment') AND isset($buttons["like"])) {
+		if (($item["item_network"] == NETWORK_FACEBOOK) && ($indent == 'comment') && isset($buttons["like"])) {
 			unset($buttons["like"]);
 		}
 
@@ -733,7 +733,7 @@ class Item extends BaseObject {
 
 		if($this->is_toplevel()) {
 			if($conv->get_mode() !== 'profile') {
-				if($this->get_data_value('wall') AND !$this->get_data_value('self')) {
+				if($this->get_data_value('wall') && !$this->get_data_value('self')) {
 					// On the network page, I am the owner. On the display page it will be the profile owner.
 					// This will have been stored in $a->page_contact by our calling page.
 					// Put this person as the wall owner of the wall-to-wall notice.
diff --git a/src/App.php b/src/App.php
index 26cfcaadb1..f6b568ae8a 100644
--- a/src/App.php
+++ b/src/App.php
@@ -406,7 +406,7 @@ class App {
 				$this->hostname = Config::get('config', 'hostname');
 			}
 
-			if (!isset($this->hostname) OR ( $this->hostname == '')) {
+			if (!isset($this->hostname) || ( $this->hostname == '')) {
 				$this->hostname = $hostname;
 			}
 		}
@@ -850,7 +850,7 @@ class App {
 			$meminfo[$key] = (int) ($meminfo[$key] / 1024);
 		}
 
-		if (!isset($meminfo['MemAvailable']) OR ! isset($meminfo['MemFree'])) {
+		if (!isset($meminfo['MemAvailable']) || ! isset($meminfo['MemFree'])) {
 			return false;
 		}
 
@@ -907,7 +907,7 @@ class App {
 		$cachekey = 'app:proc_run:started';
 		$result = Cache::get($cachekey);
 
-		if (!is_null($result) AND ( time() - $result) < 2) {
+		if (!is_null($result) && ( time() - $result) < 2) {
 			return;
 		}
 
@@ -949,7 +949,7 @@ class App {
 	 * @return string system username
 	 */
 	static function systemuser() {
-		if (!function_exists('posix_getpwuid') OR ! function_exists('posix_geteuid')) {
+		if (!function_exists('posix_getpwuid') || ! function_exists('posix_geteuid')) {
 			return '';
 		}
 
@@ -980,7 +980,7 @@ class App {
 			logger('Path "' . $directory . '" is not a directory for user ' . self::systemuser(), LOGGER_DEBUG);
 			return false;
 		}
-		if ($check_writable AND !is_writable($directory)) {
+		if ($check_writable && !is_writable($directory)) {
 			logger('Path "' . $directory . '" is not writable for user ' . self::systemuser(), LOGGER_DEBUG);
 			return false;
 		}
diff --git a/src/Core/Config.php b/src/Core/Config.php
index 4e5c1e3d04..d454de3921 100644
--- a/src/Core/Config.php
+++ b/src/Core/Config.php
@@ -151,7 +151,7 @@ class Config {
 
 		$stored = self::get($family, $key, null, true);
 
-		if (($stored === $dbvalue) AND self::$in_db[$family][$key]) {
+		if (($stored === $dbvalue) && self::$in_db[$family][$key]) {
 			return true;
 		}
 
@@ -167,7 +167,7 @@ class Config {
 		// manage array value
 		$dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 
-		if (is_null($stored) OR !self::$in_db[$family][$key]) {
+		if (is_null($stored) || !self::$in_db[$family][$key]) {
 			$ret = q("INSERT INTO `config` (`cat`, `k`, `v`) VALUES ('%s', '%s', '%s') ON DUPLICATE KEY UPDATE `v` = '%s'",
 				dbesc($family),
 				dbesc($key),
diff --git a/src/Core/PConfig.php b/src/Core/PConfig.php
index 6ced9fc755..2cfcfc235a 100644
--- a/src/Core/PConfig.php
+++ b/src/Core/PConfig.php
@@ -138,7 +138,7 @@ class PConfig {
 
 		$stored = self::get($uid, $family, $key, null, true);
 
-		if (($stored === $dbvalue) AND self::$in_db[$uid][$family][$key]) {
+		if (($stored === $dbvalue) && self::$in_db[$uid][$family][$key]) {
 			return true;
 		}
 
@@ -147,7 +147,7 @@ class PConfig {
 		// manage array value
 		$dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
 
-		if (is_null($stored) OR !self::$in_db[$uid][$family][$key]) {
+		if (is_null($stored) || !self::$in_db[$uid][$family][$key]) {
 			$ret = q("INSERT INTO `pconfig` (`uid`, `cat`, `k`, `v`) VALUES (%d, '%s', '%s', '%s') ON DUPLICATE KEY UPDATE `v` = '%s'",
 				intval($uid),
 				dbesc($family),
diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index 531fdfef64..f0bb17dacd 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -104,7 +104,7 @@ class Probe {
 		logger("Probing for ".$host, LOGGER_DEBUG);
 
 		$ret = z_fetch_url($ssl_url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
-		if (($ret['errno'] == CURLE_OPERATION_TIMEDOUT) AND !self::ownHost($ssl_url)) {
+		if (($ret['errno'] == CURLE_OPERATION_TIMEDOUT) && !self::ownHost($ssl_url)) {
 			logger("Probing timeout for ".$ssl_url, LOGGER_DEBUG);
 			return false;
 		}
@@ -144,11 +144,11 @@ class Probe {
 			}
 
 			if (($attributes["rel"] == "lrdd")
-				AND ($attributes["type"] == "application/xrd+xml")
+				&& ($attributes["type"] == "application/xrd+xml")
 			) {
 				$xrd_data["lrdd-xml"] = $attributes["template"];
 			} elseif (($attributes["rel"] == "lrdd")
-				AND ($attributes["type"] == "application/json")
+				&& ($attributes["type"] == "application/json")
 			) {
 				$xrd_data["lrdd-json"] = $attributes["template"];
 			} elseif ($attributes["rel"] == "lrdd") {
@@ -195,7 +195,7 @@ class Probe {
 				if ($link['@attributes']['rel'] === NAMESPACE_DFRN) {
 					$profile_link = $link['@attributes']['href'];
 				}
-				if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) AND ($profile_link == "")) {
+				if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) && ($profile_link == "")) {
 					$profile_link = 'stat:'.$link['@attributes']['template'];
 				}
 				if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard') {
@@ -244,7 +244,7 @@ class Probe {
 			do {
 				$lrdd = self::xrd($host);
 				$host .= "/".array_shift($path_parts);
-			} while (!$lrdd AND (sizeof($path_parts) > 0));
+			} while (!$lrdd && (sizeof($path_parts) > 0));
 		}
 
 		if (!$lrdd) {
@@ -264,7 +264,7 @@ class Probe {
 			$path = str_replace('{uri}', urlencode($uri), $link);
 			$webfinger = self::webfinger($path);
 
-			if (!$webfinger AND (strstr($uri, "@"))) {
+			if (!$webfinger && (strstr($uri, "@"))) {
 				$path = str_replace('{uri}', urlencode("acct:".$uri), $link);
 				$webfinger = self::webfinger($path);
 			}
@@ -272,7 +272,7 @@ class Probe {
 			// Special treatment for Mastodon
 			// Problem is that Mastodon uses an URL format like http://domain.tld/@nick
 			// But the webfinger for this format fails.
-			if (!$webfinger AND isset($nick)) {
+			if (!$webfinger && isset($nick)) {
 				// Mastodon uses a "@" as prefix for usernames in their url format
 				$nick = ltrim($nick, '@');
 
@@ -340,7 +340,7 @@ class Probe {
 			$data["photo"] = App::get_baseurl().'/images/person-175.jpg';
 		}
 
-		if (!isset($data["name"]) OR ($data["name"] == "")) {
+		if (!isset($data["name"]) || ($data["name"] == "")) {
 			if (isset($data["nick"])) {
 				$data["name"] = $data["nick"];
 			}
@@ -350,7 +350,7 @@ class Probe {
 			}
 		}
 
-		if (!isset($data["nick"]) OR ($data["nick"] == "")) {
+		if (!isset($data["nick"]) || ($data["nick"] == "")) {
 			$data["nick"] = strtolower($data["name"]);
 
 			if (strpos($data['nick'], ' ')) {
@@ -377,12 +377,12 @@ class Probe {
 			/// It should only be updated if the existing picture isn't existing anymore.
 			/// We only update the contact when it is no probing for a specific network.
 			if (($data['network'] != NETWORK_FEED)
-				AND ($network == "")
-				AND $data["name"]
-				AND $data["nick"]
-				AND $data["url"]
-				AND $data["addr"]
-				AND $data["poll"]
+				&& ($network == "")
+				&& $data["name"]
+				&& $data["nick"]
+				&& $data["url"]
+				&& $data["addr"]
+				&& $data["poll"]
 			) {
 				q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
 						`notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
@@ -417,7 +417,7 @@ class Probe {
 	private function detect($uri, $network, $uid) {
 		$parts = parse_url($uri);
 
-		if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
+		if (isset($parts["scheme"]) && isset($parts["host"]) && isset($parts["path"])) {
 			$host = $parts["host"];
 			if (isset($parts["port"])) {
 				$host .= ':'.$parts["port"];
@@ -434,7 +434,7 @@ class Probe {
 
 			$path_parts = explode("/", trim($parts["path"], "/"));
 
-			while (!$lrdd AND (sizeof($path_parts) > 1)) {
+			while (!$lrdd && (sizeof($path_parts) > 1)) {
 				$host .= "/".array_shift($path_parts);
 				$lrdd = self::xrd($host);
 			}
@@ -501,7 +501,7 @@ class Probe {
 			$webfinger = self::webfinger($path);
 
 			// We cannot be sure that the detected address was correct, so we don't use the values
-			if ($webfinger AND ($uri != $addr)) {
+			if ($webfinger && ($uri != $addr)) {
 				$nick = "";
 				$addr = "";
 			}
@@ -529,32 +529,32 @@ class Probe {
 		if (in_array($network, array("", NETWORK_DFRN))) {
 			$result = self::dfrn($webfinger);
 		}
-		if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA)) {
+		if ((!$result && ($network == "")) || ($network == NETWORK_DIASPORA)) {
 			$result = self::diaspora($webfinger);
 		}
-		if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS)) {
+		if ((!$result && ($network == "")) || ($network == NETWORK_OSTATUS)) {
 			$result = self::ostatus($webfinger);
 		}
-		if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO)) {
+		if ((!$result && ($network == "")) || ($network == NETWORK_PUMPIO)) {
 			$result = self::pumpio($webfinger);
 		}
-		if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED)) {
+		if ((!$result && ($network == "")) || ($network == NETWORK_FEED)) {
 			$result = self::feed($uri);
 		} else {
 			// We overwrite the detected nick with our try if the previois routines hadn't detected it.
 			// Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
-			if ((!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " "))) AND ($nick != "")) {
+			if ((!isset($result["nick"]) || ($result["nick"] == "") || (strstr($result["nick"], " "))) && ($nick != "")) {
 				$result["nick"] = $nick;
 			}
 
-			if ((!isset($result["addr"]) OR ($result["addr"] == "")) AND ($addr != "")) {
+			if ((!isset($result["addr"]) || ($result["addr"] == "")) && ($addr != "")) {
 				$result["addr"] = $addr;
 			}
 		}
 
 		logger($uri." is ".$result["network"], LOGGER_DEBUG);
 
-		if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
+		if (!isset($result["baseurl"]) || ($result["baseurl"] == "")) {
 			$pos = strpos($result["url"], $host);
 			if ($pos) {
 				$result["baseurl"] = substr($result["url"], 0, $pos).$host;
@@ -762,12 +762,12 @@ class Probe {
 		$data = self::pollNoscrape($noscrape_url, $data);
 
 		if (!isset($data["notify"])
-			OR !isset($data["confirm"])
-			OR !isset($data["request"])
-			OR !isset($data["poll"])
-			OR !isset($data["poco"])
-			OR !isset($data["name"])
-			OR !isset($data["photo"])
+			|| !isset($data["confirm"])
+			|| !isset($data["request"])
+			|| !isset($data["poll"])
+			|| !isset($data["poco"])
+			|| !isset($data["name"])
+			|| !isset($data["photo"])
 		) {
 			$data = self::pollHcard($profile_link, $data, true);
 		}
@@ -801,33 +801,33 @@ class Probe {
 		$hcard_url = "";
 		$data = array();
 		foreach ($webfinger["links"] as $link) {
-			if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != "")) {
+			if (($link["rel"] == NAMESPACE_DFRN) && ($link["href"] != "")) {
 				$data["network"] = NETWORK_DFRN;
-			} elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
 				$data["poll"] = $link["href"];
-			} elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && ($link["type"] == "text/html") && ($link["href"] != "")) {
 				$data["url"] = $link["href"];
-			} elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://microformats.org/profile/hcard") && ($link["href"] != "")) {
 				$hcard_url = $link["href"];
-			} elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == NAMESPACE_POCO) && ($link["href"] != "")) {
 				$data["poco"] = $link["href"];
-			} elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://webfinger.net/rel/avatar") && ($link["href"] != "")) {
 				$data["photo"] = $link["href"];
-			} elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://joindiaspora.com/seed_location") && ($link["href"] != "")) {
 				$data["baseurl"] = trim($link["href"], '/');
-			} elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://joindiaspora.com/guid") && ($link["href"] != "")) {
 				$data["guid"] = $link["href"];
-			} elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "diaspora-public-key") && ($link["href"] != "")) {
 				$data["pubkey"] = base64_decode($link["href"]);
 
-				//if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
+				//if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
 				if (strstr($data["pubkey"], 'RSA ')) {
 					$data["pubkey"] = rsatopem($data["pubkey"]);
 				}
 			}
 		}
 
-		if (!isset($data["network"]) OR ($hcard_url == "")) {
+		if (!isset($data["network"]) || ($hcard_url == "")) {
 			return false;
 		}
 
@@ -836,11 +836,11 @@ class Probe {
 		$data = self::pollNoscrape($noscrape_url, $data);
 
 		if (isset($data["notify"])
-			AND isset($data["confirm"])
-			AND isset($data["request"])
-			AND isset($data["poll"])
-			AND isset($data["name"])
-			AND isset($data["photo"])
+			&& isset($data["confirm"])
+			&& isset($data["request"])
+			&& isset($data["poll"])
+			&& isset($data["name"])
+			&& isset($data["photo"])
 		) {
 			return $data;
 		}
@@ -887,7 +887,7 @@ class Probe {
 			// We have to discard the guid from the hcard in favour of the guid from lrdd
 			// Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
 			$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
-			if (($search->length > 0) AND ($data["guid"] == "")) {
+			if (($search->length > 0) && ($data["guid"] == "")) {
 				$data["guid"] = $search->item(0)->nodeValue;
 			}
 
@@ -928,13 +928,13 @@ class Probe {
 				$attr[$attribute->name] = trim($attribute->value);
 			}
 
-			if (isset($attr["src"]) AND isset($attr["width"])) {
+			if (isset($attr["src"]) && isset($attr["width"])) {
 				$avatar[$attr["width"]] = $attr["src"];
 			}
 
 			// We don't have a width. So we just take everything that we got.
 			// This is a Hubzilla workaround which doesn't send a width.
-			if ((sizeof($avatar) == 0) AND isset($attr["src"])) {
+			if ((sizeof($avatar) == 0) && isset($attr["src"])) {
 				$avatar[] = $attr["src"];
 			}
 		}
@@ -981,37 +981,37 @@ class Probe {
 		$hcard_url = "";
 		$data = array();
 		foreach ($webfinger["links"] as $link) {
-			if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
+			if (($link["rel"] == "http://microformats.org/profile/hcard") && ($link["href"] != "")) {
 				$hcard_url = $link["href"];
-			} elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://joindiaspora.com/seed_location") && ($link["href"] != "")) {
 				$data["baseurl"] = trim($link["href"], '/');
-			} elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://joindiaspora.com/guid") && ($link["href"] != "")) {
 				$data["guid"] = $link["href"];
-			} elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && ($link["type"] == "text/html") && ($link["href"] != "")) {
 				$data["url"] = $link["href"];
-			} elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
 				$data["poll"] = $link["href"];
-			} elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == NAMESPACE_POCO) && ($link["href"] != "")) {
 				$data["poco"] = $link["href"];
-			} elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "salmon") && ($link["href"] != "")) {
 				$data["notify"] = $link["href"];
-			} elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "diaspora-public-key") && ($link["href"] != "")) {
 				$data["pubkey"] = base64_decode($link["href"]);
 
-				//if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
+				//if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
 				if (strstr($data["pubkey"], 'RSA ')) {
 					$data["pubkey"] = rsatopem($data["pubkey"]);
 				}
 			}
 		}
 
-		if (!isset($data["url"]) OR ($hcard_url == "")) {
+		if (!isset($data["url"]) || ($hcard_url == "")) {
 			return false;
 		}
 
 		if (is_array($webfinger["aliases"])) {
 			foreach ($webfinger["aliases"] as $alias) {
-				if (normalise_link($alias) != normalise_link($data["url"]) AND ! strstr($alias, "@")) {
+				if (normalise_link($alias) != normalise_link($data["url"]) && ! strstr($alias, "@")) {
 					$data["alias"] = $alias;
 				}
 			}
@@ -1025,10 +1025,10 @@ class Probe {
 		}
 
 		if (isset($data["url"])
-			AND isset($data["guid"])
-			AND isset($data["baseurl"])
-			AND isset($data["pubkey"])
-			AND ($hcard_url != "")
+			&& isset($data["guid"])
+			&& isset($data["baseurl"])
+			&& isset($data["pubkey"])
+			&& ($hcard_url != "")
 		) {
 			$data["network"] = NETWORK_DIASPORA;
 
@@ -1062,21 +1062,21 @@ class Probe {
 			}
 		}
 
-		if (is_string($webfinger["subject"]) AND strstr($webfinger["subject"], "@")) {
+		if (is_string($webfinger["subject"]) && strstr($webfinger["subject"], "@")) {
 			$data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
 		}
 		$pubkey = "";
 		foreach ($webfinger["links"] as $link) {
 			if (($link["rel"] == "http://webfinger.net/rel/profile-page")
-				AND ($link["type"] == "text/html")
-				AND ($link["href"] != "")
+				&& ($link["type"] == "text/html")
+				&& ($link["href"] != "")
 			) {
 				$data["url"] = $link["href"];
-			} elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "salmon") && ($link["href"] != "")) {
 				$data["notify"] = $link["href"];
-			} elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
 				$data["poll"] = $link["href"];
-			} elseif (($link["rel"] == "magic-public-key") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "magic-public-key") && ($link["href"] != "")) {
 				$pubkey = $link["href"];
 
 				if (substr($pubkey, 0, 5) === 'data:') {
@@ -1103,9 +1103,9 @@ class Probe {
 			}
 		}
 
-		if (isset($data["notify"]) AND isset($data["pubkey"])
-			AND isset($data["poll"])
-			AND isset($data["url"])
+		if (isset($data["notify"]) && isset($data["pubkey"])
+			&& isset($data["poll"])
+			&& isset($data["url"])
 		) {
 			$data["network"] = NETWORK_OSTATUS;
 		} else {
@@ -1200,21 +1200,21 @@ class Probe {
 		$data = array();
 		foreach ($webfinger["links"] as $link) {
 			if (($link["rel"] == "http://webfinger.net/rel/profile-page")
-				AND ($link["type"] == "text/html")
-				AND ($link["href"] != "")
+				&& ($link["type"] == "text/html")
+				&& ($link["href"] != "")
 			) {
 				$data["url"] = $link["href"];
-			} elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "activity-inbox") && ($link["href"] != "")) {
 				$data["notify"] = $link["href"];
-			} elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "activity-outbox") && ($link["href"] != "")) {
 				$data["poll"] = $link["href"];
-			} elseif (($link["rel"] == "dialback") AND ($link["href"] != "")) {
+			} elseif (($link["rel"] == "dialback") && ($link["href"] != "")) {
 				$data["dialback"] = $link["href"];
 			}
 		}
-		if (isset($data["poll"]) AND isset($data["notify"])
-			AND isset($data["dialback"])
-			AND isset($data["url"])
+		if (isset($data["poll"]) && isset($data["notify"])
+			&& isset($data["dialback"])
+			&& isset($data["url"])
 		) {
 			// by now we use these fields only for the network type detection
 			// So we unset all data that isn't used at the moment
diff --git a/src/Util/Lock.php b/src/Util/Lock.php
index 26ccdc9dd2..b2c5afc662 100644
--- a/src/Util/Lock.php
+++ b/src/Util/Lock.php
@@ -68,7 +68,7 @@ class Lock {
 
 					// When the process id isn't used anymore, we can safely claim the lock for us.
 					// Or we do want to lock something that was already locked by us.
-					if (!posix_kill($pid, 0) OR ($pid == getmypid())) {
+					if (!posix_kill($pid, 0) || ($pid == getmypid())) {
 						$lock = false;
 					}
 				}
@@ -76,10 +76,10 @@ class Lock {
 					$memcache->set($cachekey, getmypid(), MEMCACHE_COMPRESSED, 300);
 					$got_lock = true;
 				}
-				if (!$got_lock AND ($timeout > 0)) {
+				if (!$got_lock && ($timeout > 0)) {
 					usleep($wait_sec * 1000000);
 				}
-			} while (!$got_lock AND ((time() - $start) < $timeout));
+			} while (!$got_lock && ((time() - $start) < $timeout));
 
 			return $got_lock;
 		}
@@ -112,10 +112,10 @@ class Lock {
 
 			dba::unlock();
 
-			if (!$got_lock AND ($timeout > 0)) {
+			if (!$got_lock && ($timeout > 0)) {
 				sleep($wait_sec);
 			}
-		} while (!$got_lock AND ((time() - $start) < $timeout));
+		} while (!$got_lock && ((time() - $start) < $timeout));
 
 		return $got_lock;
 	}
diff --git a/update.php b/update.php
index df52e8582b..83f3dada53 100644
--- a/update.php
+++ b/update.php
@@ -1652,7 +1652,7 @@ function update_1180() {
 
 function update_1188() {
 
-	if (strlen(get_config('system','directory_submit_url')) AND
+	if (strlen(get_config('system','directory_submit_url')) &&
 		!strlen(get_config('system','directory'))) {
 		set_config('system','directory', dirname(get_config('system','directory_submit_url')));
 		del_config('system','directory_submit_url');
diff --git a/util/maintenance.php b/util/maintenance.php
index 40634e0d89..9c9fc4f19d 100644
--- a/util/maintenance.php
+++ b/util/maintenance.php
@@ -24,7 +24,7 @@ if ($argc > 1) {
 
 Config::set('system', 'maintenance', $maint_mode);
 
-if ($maint_mode AND ($argc > 2)) {
+if ($maint_mode && ($argc > 2)) {
 	$reason_arr = $argv;
 	array_shift($reason_arr);
 	array_shift($reason_arr);
diff --git a/view/theme/frio/php/frio_boot.php b/view/theme/frio/php/frio_boot.php
index 17fbb1fbac..91e0f6ff35 100644
--- a/view/theme/frio/php/frio_boot.php
+++ b/view/theme/frio/php/frio_boot.php
@@ -15,9 +15,9 @@ use Friendica\App;
  * @todo Check if this is really needed.
  */
 function load_page(App $a) {
-	if(isset($_GET["mode"]) AND ($_GET["mode"] == "minimal")) {
+	if(isset($_GET["mode"]) && ($_GET["mode"] == "minimal")) {
 		require "view/theme/frio/minimal.php";
-	} elseif((isset($_GET["mode"]) AND ($_GET["mode"] == "none"))) {
+	} elseif((isset($_GET["mode"]) && ($_GET["mode"] == "none"))) {
 		require "view/theme/frio/none.php";
 	} else {
 		$template = 'view/theme/' . current_theme() . '/'
diff --git a/view/theme/vier/style.php b/view/theme/vier/style.php
index 3d3c776745..dba758ca24 100644
--- a/view/theme/vier/style.php
+++ b/view/theme/vier/style.php
@@ -46,7 +46,7 @@ if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) || isset($_SERVER['HTTP_IF_NONE_MA
 	$cached_etag = str_replace(array('"', "-gzip"), array('', ''),
 				stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));
 
-	if (($cached_modified == $modified) AND ($cached_etag == $etag)) {
+	if (($cached_modified == $modified) && ($cached_etag == $etag)) {
 		header('HTTP/1.1 304 Not Modified');
 		exit();
 	}
diff --git a/view/theme/vier/theme.php b/view/theme/vier/theme.php
index 269b34460c..eaee46e928 100644
--- a/view/theme/vier/theme.php
+++ b/view/theme/vier/theme.php
@@ -96,14 +96,14 @@ EOT;
 
 	// Hide the left menu bar
 	/// @TODO maybe move this static array out where it should belong?
-	if (($a->page['aside'] == "") AND in_array($a->argv[0], array("community", "events", "help", "manage", "notifications",
+	if (($a->page['aside'] == "") && in_array($a->argv[0], array("community", "events", "help", "manage", "notifications",
 			"probe", "webfinger", "login", "invite", "credits"))) {
 		$a->page['htmlhead'] .= "<link rel='stylesheet' href='view/theme/vier/hide.css' />";
 	}
 }
 
 function get_vier_config($key, $default = false, $admin = false) {
-	if (local_user() AND !$admin) {
+	if (local_user() && !$admin) {
 		$result = get_pconfig(local_user(), "vier", $key);
 		if ($result !== false) {
 			return $result;
@@ -186,7 +186,7 @@ function vier_community_info() {
 	}
 
 	//right_aside FIND FRIENDS
-	if ($show_friends AND local_user()) {
+	if ($show_friends && local_user()) {
 		$nv = array();
 		$nv['title'] = array("", t('Find Friends'), "", "");
 		$nv['directory'] = array('directory', t('Local Directory'), "", "");
@@ -206,7 +206,7 @@ function vier_community_info() {
 	}
 
 	//Community_Pages at right_aside
-	if ($show_pages AND local_user()) {
+	if ($show_pages && local_user()) {
 
 		require_once 'include/ForumManager.php';
 
@@ -372,7 +372,7 @@ function vier_community_info() {
 			$r[] = array("photo" => "images/wordpress.png", "name" => "Wordpress");
 		}
 
-		if (function_exists("imap_open") AND !get_config("system","imap_disabled") AND !get_config("system","dfrn_only")) {
+		if (function_exists("imap_open") && !get_config("system","imap_disabled") && !get_config("system","dfrn_only")) {
 			$r[] = array("photo" => "images/mail.png", "name" => "E-Mail");
 		}