php发送post 请求URL

protected function http_request($url, $data = null)

{

           $curl = curl_init();

           curl_setopt($curl, CURLOPT_URL, $url);

           curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

           curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

           if (!empty($data)){

                  curl_setopt($curl, CURLOPT_POST, 1);

                  curl_setopt($curl, CURLOPT_POSTFIELDS, $data);

              }

              curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);

               $output = curl_exec($curl);

               curl_close($curl);

               return $output;

}