add smarty engine, remove some obsolete zot1 stuff

library/Smarty/libs/plugins/modifier.regex_replace.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * Smarty plugin
+ *
+ * @package Smarty
+ * @subpackage PluginsModifier
+ */
+
+/**
+ * Smarty regex_replace modifier plugin
+ *
+ * Type:     modifier<br>
+ * Name:     regex_replace<br>
+ * Purpose:  regular expression search/replace
+ *
+ * @link http://smarty.php.net/manual/en/language.modifier.regex.replace.php
+ *          regex_replace (Smarty online manual)
+ * @author Monte Ohrt <monte at ohrt dot com>
+ * @param string       $string   input string
+ * @param string|array $search   regular expression(s) to search for
+ * @param string|array $replace  string(s) that should be replaced
+ * @return string
+ */
+function smarty_modifier_regex_replace($string, $search, $replace)
+{
+    if(is_array($search)) {
+        foreach($search as $idx => $s) {
+            $search[$idx] = _smarty_regex_replace_check($s);
+        }
+    } else {
+        $search = _smarty_regex_replace_check($search);
+    }
+    return preg_replace($search, $replace, $string);
+}
+
+/**
+ * @param  string $search string(s) that should be replaced
+ * @return string
+ * @ignore
+ */
+function _smarty_regex_replace_check($search)
+{
+    // null-byte injection detection
+    // anything behind the first null-byte is ignored
+    if (($pos = strpos($search,"\0")) !== false) {
+        $search = substr($search,0,$pos);
+    }
+    // remove eval-modifier from $search
+    if (preg_match('!([a-zA-Z\s]+)$!s', $search, $match) && (strpos($match[1], 'e') !== false)) {
+        $search = substr($search, 0, -strlen($match[1])) . preg_replace('![e\s]+!', '', $match[1]);
+    }
+    return $search;
+}
+
+?>