Cml\Http\Request::getService PHP Method

    public static function getService($name = '')
    {
        if ($name == '') {
            return $_SERVER;
        }
        return isset($_SERVER[$name]) ? strip_tags($_SERVER[$name]) : '';
    }

 /**
  * 类加载-设置全局TOKEN，防止CSRF攻击
  *
  *  @return void
  */
 public static function setToken()
 {
     if (!isset($_COOKIE['CML_TOKEN']) || empty($_COOKIE['CML_TOKEN'])) {
         $str = substr(md5(Cml::$nowTime . Request::getService('HTTP_USER_AGENT')), 5, 8);
         setcookie('CML_TOKEN', $str, null, '/');
         $_COOKIE['CML_TOKEN'] = $str;
     }
 }