$ch = curl_init ();

curl_setopt ( $ch, CURLOPT_URL, "http://site" );

$output = curl_exec($ch);

curl_close ( $ch );

public static function curlGet($url,$cookiefile,$header=null){

        try{

            $ch = curl_init ();

            curl_setopt ( $ch, CURLOPT_URL, $url );

            curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );

            //不知道如何看发出去的数据是什么样子的 使用这句话 可通过抓包工具查看到

            // 需要抓包工具配合使用

            curl_setopt($ch,CURLOPT_PROXY,'192.168.2.221:8889');

            if($header){

//                 curl_setopt ( $ch, CURLOPT_HEADER, 1 );

                curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

//                 curl_setopt ( $ch, CURLOPT_COOKIE,$header['Cookie'] );

//                 curl_setopt ( $ch, CURLOPT_COOKIESESSION,$header['Cookie'] );

            }

            else{

                curl_setopt ( $ch, CURLOPT_HEADER, 0 );

            }

            if($cookiefile){

                curl_setopt ( $ch, CURLOPT_COOKIEFILE, $cookiefile ); // 读取cookie

                curl_setopt ( $ch, CURLOPT_COOKIEJAR, $cookiefile ); // 设置Cookie信息保存在指定的文件中

            }

            $output = curl_exec($ch);
//          获取curl 信息

            $information = curl_getinfo($ch);

            curl_close ( $ch );

        }catch(\Exception $e){

            print_r($e->getMessage());

        }

        return $output;

    }

public static function curlPost($url,$data,$cookiefile=null,$header=null){

        try{

            $ch = curl_init ();

            curl_setopt ( $ch, CURLOPT_URL, $url );

            curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );

            curl_setopt ( $ch, CURLOPT_POST, 1 );

            curl_setopt($ch,CURLOPT_PROXY,'192.168.2.221:8889');

            if($header){

                curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

            }

            else{

                curl_setopt ( $ch, CURLOPT_HEADER, 0 );

            }

            if($cookiefile){
　　　　　　　　　　curl_setopt ( $ch, CURLOPT_COOKIEFILE, $cookiefile ); // 读取cookie

                curl_setopt ( $ch, CURLOPT_COOKIEJAR, $cookiefile ); // 设置Cookie信息保存在指定的文件中

            }

   　　　　　　//!!!注意data的格式

            curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data);

            //设置响应超时时间

            curl_setopt($ch, CURLOPT_TIMEOUT, 120);

            $output = curl_exec($ch);

            if($output === false){

                if(curl_errno($ch) == CURLE_OPERATION_TIMEDOUT){

                    //处理逻辑

                }

            }

            $information = curl_getinfo($ch);

            curl_close ( $ch );

        }catch(\Exception $e){

            print_r($e->getMessage());

        }

        return $output;

    }