一、文档
参考:https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/Wechat_webpage_authorization.html
二、代码
1 require_once('weixin.class.php');
2 $weixin = new class_weixin();
3 $openid = "";
4 if(! isset($_GET["code"])){
5 $redirect_url = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
6 $jumpurl = $weixin->oauth2_authorize($redirect_url, "snsapi_base", "123");
7 Header("Location: $jumpurl");
8 exit();
9 }else{
10 $access_token = $weixin->oauth2_access_token($_GET["code"]);
11 $openid = $access_token['openid'];
12 $info = $weixin->get_user_info($openid);
13 if($info["subscribe"] == 1){
14 $href = "http://www.baidu.com/";
15 }else{
16 $href = "http://mp.weixin.qq.com/s? __biz=MzA5NzM2MTI4OA==&mid=203240737&idx=1&sn=007bbbe06fb89cbce76d6f8b619acc1a&scene=0#wechat_redirect";
17 }
18 Header("Location: $href");
19 exit();
20 }