public  static function ip()
        {
            if (getenv("HTTP_CLIENT_IP")) {
                $ip = getenv("HTTP_CLIENT_IP");
            } elseif (getenv("HTTP_X_FORWARDED_FOR")) {
                $ip = getenv("HTTP_X_FORWARDED_FOR");
                if (strstr($ip, ',')) {
                    $tmp = explode(',', $ip);
                    $ip = trim($tmp[0]);
                }
            } else {
                $ip = getenv("REMOTE_ADDR");
            }

            return $ip;
        }