微信公众平台OAuth2.0网页授权php示例

来源:互联网 发布:java方法的命名规则 编辑:程序博客网 时间:2024/06/03 13:48


本文转载自:http://huangqiqing123.iteye.com/blog/2005770


1、配置授权回调页面域名,如 www.aaa.com

2、模拟公众号的第三方网页,fn_system.php

<?php    if(emptyempty($_SESSION['user'])){            header("Location:http://www.aaa.com/uc/fn_wx_login.php");  }else{      print_r($_SESSION['user']);  }    ?> 

3、访问第三方网页时,如果检查session中不存在会话信息,则跳转至登陆页,fn_wx_login.php

<?php        $appid = "公众号在微信的appid";      $url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$appid.'&redirect_uri=http%3a%2f%2fwww.aaa.com%2fuc%2ffn_callback.php&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect';      header("Location:".$url);    ?>

4、在登陆页组装appid,回跳url等信息,然后跳转至微信的用户授权页。

 

5、在微信的用户授权页,如果用户选择了“同意授权”,则微信重新回跳至第三方网页的回跳地址时,会附带上code参数。

 

6、第三方网页的回跳url中,首先从请求中取得code,然后根据code进一步换取openid和access_token,然后就可以根据openid和access_token调用微信的相关接口查询用户信息了。

<?php    $appid = "公众号在微信的appid";  $secret = "公众号在微信的app secret";  $code = $_GET["code"];  $get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code';    $ch = curl_init();  curl_setopt($ch,CURLOPT_URL,$get_token_url);  curl_setopt($ch,CURLOPT_HEADER,0);  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);  $res = curl_exec($ch);  curl_close($ch);  $json_obj = json_decode($res,true);    //根据openid和access_token查询用户信息  $access_token = $json_obj['access_token'];  $openid = $json_obj['openid'];  $get_user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';    $ch = curl_init();  curl_setopt($ch,CURLOPT_URL,$get_user_info_url);  curl_setopt($ch,CURLOPT_HEADER,0);  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);  $res = curl_exec($ch);  curl_close($ch);    //解析json  $user_obj = json_decode($res,true);  $_SESSION['user'] = $user_obj;  print_r($user_obj);    ?>