public static function list_courses($enrollable_only, $sortby, $guest, $username) { //Don't forget to set it as static global $CFG, $DB; $params = self::validate_parameters(self::list_courses_parameters(), array('enrollable_only' => $enrollable_only, 'sortby' => $sortby, 'guest' => $guest, 'username' => $username)); $auth = new auth_plugin_joomdle(); $id = $auth->list_courses($enrollable_only, $sortby, $guest, $username); return $id; }