php请求php

function post2($url, $data){//file_get_content

        $postdata = http_build_query(

            $data

        );

        $opts = array('http' =>

                      array(

                          'method'  => 'POST',

                          'header'  => 'Content-type: application/x-www-form-urlencoded',

                          'content' => $postdata

                      )

        );

        $context = stream_context_create($opts);

        $result = file_get_contents($url, false, $context);

        return $result;

    }