Destroy PHP Session on closing

Question

I have created a simple login page which is based on the sessions.

session_start();

and added a logout page that contains this

Answer 1

Server can't detect browser or tab closed, you could use Javascript or Ajax but sorry I don't have knowledge about that.

My suggestion is use Session Timeout, so session will be destroyed if there's no action from user. This is an example :

// destroy every 2 minutes

if (isset($_SESSION['LAST_ACTIVITY']) && (time() - $_SESSION['LAST_ACTIVITY'] > 120)) {
    // last request was more than 2 minutes ago
    session_destroy();   // destroy session data in storage
}
$_SESSION['LAST_ACTIVITY'] = time(); // update last activity time stamp

// end of code

Hope this help you