微信开发4——PHP实现PC扫码授权登陆获取用户信息

首先须要申请,必须企业,个体工商户,媒体等，微信开放平台申请地址 https://open.weixin.qq.com/，要交300多的费用才能开通

1，编写入口：微信开放平台的扫码登陆开放的接口可以自动生成PC扫码页面，你得到了官方通过审核的appid和appsecret后，先构造一个扫码网址入口（这里以"一号店"的扫码登陆页面为例子）

https://open.weixin.qq.com/connect/qrconnect?appid=wxbdc5610cc59c1631&redirect_uri=https%3A%2F%2Fpassport.yhd.com%2Fwechat%2Fcallback.do&response_type=code&scope=snsapi_login&state=3d6be0a4035d839573b04816624a415e#wechat_redirect

访问后

扫码后手机端效果

入口代码如下：

<?php
//-------配置
$AppID = 'wxbdc5610cc59c1631';
$AppSecret = 'd4624c36333337afxxxxxxxxxxxxxx';
$callback  =  'https://passport.yhd.com/wechat/callback.php'; //回调地址
//微信登录 login.php
session_start();
//-------生成唯一随机串防CSRF攻击
$state  = md5(uniqid(rand(),TRUE));
$_SESSION["wx_state"]    =   $state; //存到SESSION
$callback = urlencode($callback);
$wxurl = "https://open.weixin.qq.com/connect/qrconnect?appid=".$AppID."&redirect_uri={$callback}&response_type=code&scope=snsapi_login&state={$state}#wechat_redirect";
header("Location: $wxurl");
?>

回调文件callback.php

<?php
//验证CSRF攻击
if($_GET['state']!=$_SESSION["wx_state"]){exit("5001");
}
$AppID = 'wx33333333334d4';
$AppSecret = 'd4624c363333330547af5443d';
$url='https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$AppID.'&secret='.$AppSecret.'&code='.$_GET['code'].'&grant_type=authorization_code';
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_URL, $url);
$json =  curl_exec($ch);
curl_close($ch);
$arr=json_decode($json,1);
//得到 access_token 与 openid
print_r($arr);    
$url='https://api.weixin.qq.com/sns/userinfo?access_token='.$arr['access_token'].'&openid='.$arr['openid'].'&lang=zh_CN';
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_URL, $url);
$json =  curl_exec($ch);
curl_close($ch);
$arr=json_decode($json,1);
得到 用户资料
print_r($arr);   
?>

PC端最终效果如下：