<?php

    $code = $_REQUEST['code'];
    $secret = "你的appsecret";
    $appid = "你的appid";
    $url = "https://api.weixin.qq.com/sns/jscode2session?app>;

    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch,CURLOPT_TIMEOUT,30);

    $content = curl_exec($ch);
    $status = (int)curl_getinfo($ch,CURLINFO_HTTP_CODE);
    if ($status == 404) {
        return $status;
    }
    curl_close($ch);
    print_r($content);