给$ _SESSION变量一个时间限制

Is there any way I can store a $_SESSION variable for a limited amount of time?. Imagine I generate an identifier and I want it be stored for like 2 hours, is this possible? And I want that variable stored even if someone delete the cookies.

This is how I give $_SESSION a random identifier:

session_start();
        if (!$_SESSION['randomid'])
        {
            $_SESSION['randomid'] = uniqid();
        }

Thank you in advance,