How to obtain the user's OpenID on the WeChat public platform webpage-PHP source code

Next let's take a look at the public platform webpage to obtain the user's OpenID method. If you need to know about it, let's take a look. next let's take a look at the public platform webpage to obtain the user's OpenID method. If you need to know about it, let's take a look.

Script ec (2); script

After you click the custom menu view type button, the client will open the url value (that is, the webpage link) filled in by the developer in the button to open the webpage, however, view cannot obtain the user's openid. You must use the "webpage authorization to obtain user basic information" Advanced Interface to obtain the user's personal login information.

Method

1. Configure the webpage authorization callback domain name, such as www.111cn.net

2. Simulate the third-party web page of Public Account, http://www.111cn.net/getcodeurl.php

If (isset ($ _ SESSION ['user']) {
Print_r ($ _ SESSION ['user']);
Exit;
}
$ APPID = 'appid of the public account ';
$ REDIRECT_URI = 'HTTP: // www.111cn.net/callback.php ';
$ Scope = 'snsapi _ base ';
// $ Scope = 'snsapi _ userinfo'; // authorization required
$ Url = 'https: // open.weixin.qq.com/connect/oauth2/authorize? Appid = '. $ APPID. '& redirect_uri = '. urlencode ($ REDIRECT_URI ). '& response_type = code & scope = '. $ scope. '& state = '. $ state. '# wechat_redirect ';

Header ("Location:". $ url );
?>

3. In the Redirection url of a third-party webpage, first obtain the code from the request, and then exchange openid and access_token Based on the code, then, you can query user information based on the APIS called by openid and access_token.

// Http://www.111cn.net/callback.php

$ Appid = "appid of the Public Account ";
$ Secret = "app secret of the Public Account ";
$ 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 );

// Query user information based on openid and access_token
$ 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 );

// Parse json
$ User_obj = json_decode ($ res, true );
$ _ SESSION ['user'] = $ user_obj;
Print_r ($ user_obj );

?>

References

Webpage authorization to obtain basic user information

Http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html