php实现qq登录

<?php
/**
* Project:QQ授权登陆
* User: luokakale
* Date: 2019/1/25
* Time: 14:22
*/

//应用的APPID
$app_id = "";
//应用的APPKEY
$app_secret = "";
//【成功授权】后的回调地址，即此地址在腾讯的信息中有储存
$my_url = "http://XXXXXXX/login.php";

/*
* No1：获取Authorization Code
*/

session_start();

if(empty($code))
{
//state参数用于防止CSRF攻击，成功授权后回调时会原样带回
$_SESSION['qq_state'] = md5(uniqid(rand(), TRUE));
//拼接URL
$dialog_url = "https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id=" . $app_id . "&redirect_uri=" . urlencode($my_url) . "&state=" . $_SESSION['qq_state'];
echo("<script> top.location.href='" . $dialog_url . "'</script>");
}

//获取qq回调时返回的code参数
$code = $_REQUEST["code"];//存放Authorization Code

/*
* NO.2 通过Authorization Code获取Access Token
*/
if($_REQUEST['state'] == $_SESSION['qq_state'] ) {
//拼接URL获取access_token
$token_url = "https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&"."client_id=" . $app_id . "&redirect_uri=" . urlencode($my_url)."&client_secret=" . $app_secret . "&code=" . $code;
$response = file_get_contents($token_url);
}

/*
* NO.3:获取用户openID
*/

//把传回来的数据参数变量化
$params = array();
parse_str($response, $params);
$graph_url = "https://graph.qq.com/oauth2.0/me?access_token=".$params['access_token'];
$str = file_get_contents($graph_url);
$user = json_decode($str);//存放返回的数据 client_id ，openid

/*
* NO.4：使用access_token来获取所接受的用户信息。
*/
$user_data_url = "https://graph.qq.com/user/get_user_info?access_token={$params['access_token']}&oauth_consumer_key={$app_id}&openid={$user->openid}&format=json";
$user_data = file_get_contents($user_data_url);//此为获取到的user信息
$user_data = json_decode($user_data, true);