1、配置授權回調頁面域名,如 www.aaa.com
2、模擬公眾號的第三方網頁,fn_system.php
<?php if(empty($_SESSION['user'])){ header("Location:http://www.aaa.net/uc/fn_wx_login.php"); }else{ print_r($_SESSION['user']); } ?>
3、訪問第三方網頁時,如果檢查session中不存在會話信息,則跳轉至登陸頁,fn_wx_login.php
<?php $appid = "公眾號在微信的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、在登陸頁組裝appid,回跳url等信息,然后跳轉至微信的用戶授權頁。
5、在微信的用戶授權頁,如果用戶選擇了“同意授權”,則微信重新回跳至第三方網頁的回跳地址時,會附帶上code參數。
6、第三方網頁的回跳url中,首先從請求中取得code,然后根據code進一步換取openid和access_token,然后就可以根據openid和access_token調用微信的相關接口查詢用戶信息了。
<?php
$appid = "公眾號在微信的appid"; $secret = "公眾號在微信的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); //根據openid和access_token查詢用戶信息 $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); ?>