How to use session timeout setting in php?

How to use session timeout setting in php: 1. Set the [php.ini] configuration file and use the [ini_set] function to change the attribute value of the current context environment; 2. Set the Session timestamp, the code is [unset( $_SESSION['expiretime'])].

php uses session timeout setting method:

The first method, That is, set the php.ini configuration file and set the session.gc_maxlifetime and session.cookie_lifetime node attribute values. Of course, you can also use the ini_set function to change them. Attribute value of the current context environment:

ini_set('session.gc_maxlifetime', "3600"); // 秒  
  ini_set("session.cookie_lifetime","3600"); // 秒

The second method, is to set the Session timestamp, such as the following method.

When the login is successful, set the timestamp to 1 hour later than the current time, $_SESSION['expiretime'] = time() 3600;. Use the following code to check the user login status:

if(isset($_SESSION['expiretime'])) {  
  
    if($_SESSION['expiretime'] < time()) {  
  
        unset($_SESSION['expiretime']);  
  
        header('Location: logout.php?TIMEOUT'); // 登出  
  
        exit(0);  
  
    } else {  
  
        $_SESSION['expiretime'] = time() + 3600; // 刷新时间戳    
    }  
  
}

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