$uid = 22222;

                $skey = 'langansafe&*#';

                $time = time();

                $vhost = 'liuwei';

                $data = array(

                                'uid'=>$uid,

                                't'=>$time,

                                'skey'=>$skey,

                                'vhost'=>$vhost,

                                'sign'=>md5(md5($uid.$skey).$time),

                );

                $url = "https://www.test.com/api2/site/index.php/token";

                $str = $this->curl($url,$data);

                $re = json_decode($str,true);

                return $re;