static function stripTags(&$value, $allowableTags = null, $allowableAttributes = null) { self::$stripTagsAllowableTags = Arrays::stringArray($allowableTags); self::$stripTagsAllowableAttributes = $allowableAttributes; return $value = preg_replace_callback('@(</?)([^>]+)(>|$)@', array(self, 'stripTagsCallback'), $value); }