public static function getCsrfToken()
 {
     $token = Star_Config::get('resources.token');
     $ip = Star_Http_Request::getIp();
     $user_agent = Star_Http_Request::getHttpAgent();
     $temp_array = array($token, $ip, $user_agent);
     sort($temp_array, SORT_STRING);
     return md5(implode('', $temp_array));
 }