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114 lines
2.7 KiB
PHP
114 lines
2.7 KiB
PHP
<?php
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namespace Zotlabs\Web;
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class HttpMeta {
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private $vars = null;
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private $og = null;
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function __construct() {
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$this->vars = [];
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$this->og = [];
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$this->ogproperties = [];
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}
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//Set Meta Value
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// Mode:
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// 0 = Default - set if no value currently exists
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// 1 = Overwrite - replace existing value(s)
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// 2 = Multi - append to the array of values
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function set($property,$value,$mode=0) {
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$ogallowsmulti = ['image','audio','video'];
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if (strpos($property,'og:') === 0) {
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$count = 0;
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foreach ($this->og as $ogk => $ogdata) {
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if (strpos($ogdata['property'],$property) === 0) {
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if ($mode == 1) {
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unset($this->og[$ogk]);
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unset($this->ogproperties[$property]);
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}
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elseif ($mode == 0) {
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return;
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}
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elseif ($value == $ogdata['value']) {
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return;
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}
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else {
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$count++;
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}
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}
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}
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if ($value !== null) {
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//mode = 1 with value === null will delete the property entirely.
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$components = explode(':',$property);
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$ogp=$components[1];
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if (!$count || in_array($ogp,$ogallowsmulti)) {
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$this->og[]=['property'=>$property,'value'=>$value];
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$this->ogproperties[$property] = $property;
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}
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}
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} else {
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$this->vars[$property] = $value;
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}
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}
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function check_required() {
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if (
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in_array('og:title',$this->ogproperties)
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&& in_array('og:type', $this->ogproperties)
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&& (in_array('og:image',$this->ogproperties)
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|| in_array('og:image:url',$this->ogproperties))
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&& (array_key_exists('og:url', $this->ogproperties)
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|| array_key_exists('og:url:secure_url', $this->ogproperties))
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&& array_key_exists('og:description', $this->ogproperties)
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) {
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return true;
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}
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return false;
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}
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function get_field($field) {
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if (strpos($field,'og:') === 0) {
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foreach ($this->og as $ogdata) {
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if (strpos($ogdata['property'],$field) === 0) {
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$arr[$field][] = $ogdata['value'];
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}
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}
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}
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else {
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$arr = $this->vars;
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}
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if ($arr && array_key_exists($field,$arr) && $arr[$field]) {
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return $arr[$field];
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}
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return false;
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}
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function get() {
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// use 'name' for most meta fields, and 'property' for opengraph properties
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$o = '';
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if ($this->vars) {
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foreach ($this->vars as $k => $v) {
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$o .= '<meta name="' . htmlspecialchars($k,ENT_COMPAT,'UTF-8',false) . '" content="' . htmlspecialchars($v,ENT_COMPAT,'UTF-8',false) . '" />' . "\r\n" ;
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}
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}
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if ($this->check_required()) {
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foreach ($this->og as $ogdata) {
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$o .= '<meta property="' . htmlspecialchars($ogdata['property'],ENT_COMPAT,'UTF-8',false) . '" content="' . htmlspecialchars($ogdata['value'],ENT_COMPAT,'UTF-8',false) . '" />' . "\r\n" ;
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}
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}
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if ($o) {
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return "\r\n" . $o;
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}
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return $o;
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}
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}
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