In PHP, what are some alternative methods for handling user session data and automatically deleting entries when a user leaves a page, aside from tracking time of last visit?

One alternative method for handling user session data and automatically deleting entries when a user leaves a page is to use AJAX requests to periodically check if the user is still active on the page. If the user has been inactive for a certain amount of time, you can then destroy their session data. 

// Check if user is still active on the page
if(isset($_SESSION['last_activity']) && (time() - $_SESSION['last_activity'] > 60)) {
    // User has been inactive for 60 seconds, destroy session data
    session_unset();
    session_destroy();
}

// Update last activity time
$_SESSION['last_activity'] = time();

Keywords

session handling PHP functions cookies expiration time session garbage collection

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