1. The user logs in to discuz and verifies the posted data through the function uc_user_login in the logging.php file, that is, verifying the username and password.
2. If the verification is successful, the function uc_user_synlogin located in the client.php file under uc_client will be called. In this function, uc_api_post('user', 'synlogin', array('uid'=>$uid)) will be called. .
3. Then this function passes data to index.php of Ucenter. Index.php accepts the passed data and obtains the value of model as user and action as synlogin.
4. Then Ucenter’s index.php calls the onsynlogin method in the user.php class in the control directory. Through the foreach loop, it uses JavaScript to notify the applications in the uc application list that enable synchronous login to log in synchronously; that is, through get method to pass some data to uc.php under the api in each application directory.
5. uc.php receives the notification and processes the data obtained, and encrypts the data through the function _authcode in the function synlogin (located in uc.php) (default uses UC_KEY as the key), and sets the cookie with the function _setcookie.
6. Each application uses the corresponding key to decode the cookie set above and obtain the user ID and other data; use this value to determine whether the user has logged in through other applications, so that the user can log in automatically.
logging.php in application ------>client.php in uc_client------>Ucenter------>api/uc.php in other applications .
In fact, the principle of Ucenter to achieve synchronous login is cookie. After an application successfully logs in, it transfers data to Ucenter and lets Ucenter notify other applications to also set cookies. In this way, users can automatically use the cookies that have been set when accessing other applications. Login.
The general steps are to first install ucenter and then copy the uc_client folder to your own project, and then configure several files
client.php is equivalent to a function library
uc.php is equivalent to the callback file
config.php is the configuration file
When you have two applications that have set up synchronous login, when you log in to one application and then execute
include './config.inc.php';
include './uc_client/client.php';
$usernames="kyee";
$passwords="123456";
list($uid, $username, $password, $email) = uc_user_login($usernames, $passwords);
if($uid > 0) {
setcookie("username",$username,time()+intval(24*3600));
echo uc_user_synlogin($uid);
echo 'Login successful';
} elseif($uid == -1) {
echo 'The user does not exist or has been deleted';
} elseif($uid == -2) {
echo 'Wrong password';
} else {
echo 'undefined';
}
uc_user_synlogin() This function represents the need to synchronize login to all other functions that enable synchronous login. uc itself will loop through all applications that enable synchronous login in the background and then output it on the page
JS code like this is sent to each application that enables synchronous login, and then the callback file uc.php of each application that enables synchronous login will be decrypted after receiving it. After decryption, you can actually Now it’s time to write the code. The code of this uc.php callback file does not have to be written in their format. You can also write your own code.
In fact, the principle of UC is very simple, that is, after an application logs in, it then polls the callback file sent to the synchronously logged-in application in the background. After the callback file receives the user ID, it generates a cookie or session and then enters the login mode.
Please check whether you are allowed to synchronize members and log in to the uncenter backend. Application management-ecshop configuration!
1. The user logs in to discuz and verifies the posted data through the function uc_user_login in the logging.php file, that is, verifying the username and password.
2. If the verification is successful, the function uc_user_synlogin located in the client.php file under uc_client will be called. In this function, uc_api_post('user', 'synlogin', array('uid'=>$ uid)).
3. Then this function passes data to index.php of Ucenter. Index.php accepts the passed data and obtains the value of model as user and action as synlogin.
4. Then Ucenter’s index.php calls the onsynlogin method in the user.php class in the control directory, and uses javascript to notify the applications in the uc application list that enable synchronous login through the foreach loop to log in synchronously; That is, some data is passed to uc.php under the api in each application directory through get method.
5. uc.php receives the notification and processes the data obtained, and encrypts the data through the function _authcode in the function synlogin (located in uc.php) (default uses UC_KEY as the key), and uses the function _setcookie Set cookies.
6. Each application uses the corresponding key to decode the cookie set above and obtain the user ID and other data; use this value to determine whether the user has logged in through other applications, so that the user can log in automatically.
Logging.php in application ------>client.php in uc_client------>Ucenter------>api/uc in application. php
In fact, the principle of Ucenter to achieve synchronous login is cookie. After an application successfully logs in, it transfers data to Ucenter and lets Ucenter notify other applications to also set cookies, so that users can set cookies when accessing other applications. Cookie to achieve automatic login. After understanding the synchronization principle of Ucenter, it will be much easier when you encounter problems with synchronous login or developing some interfaces with UCenter.
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