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);
- ?>
- 转自:http://huangqiqing123.iteye.com/blog/2005770