## 在小程序发送请求到后台，使用code去微信服务器拿取open_id ``` /** * http访问 * @param $url 访问网址 */ public function http($url,$data = null){ $curl = curl_init(); curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_TIMEOUT, 500); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($curl, CURLOPT_URL, $url); if($data){ curl_setopt($curl,CURLOPT_POST,1); curl_setopt($curl,CURLOPT_POSTFIELDS,$data);//如果要处理的数据，请在处理后再传进来 ，例如http_build_query这里不要加 } $res = curl_exec($curl); if(!$res){ $error = curl_errno($curl); echo $error; } curl_close($curl); return $res; } ``` ### 例如： ``` $url = 'https://api.weixin.qq.com/sns/jscode2session?appid='.$appid.'&secret='.$secret.'&js_code='.$code.'&grant_type=authorization_code'; $data = json_decode($this->http($url), true); ```