private function newTime()
    {
        $currentHour = date('H');
        $currentMin = date('i');
        $currentSec = date('s');
        $currentMon = date('m');
        $currentDay = date('d');
        $currentYear = date('y');
        return mktime($currentHour, ($currentMin + $_SESSION['session_time']), $currentSec, $currentMon, $currentDay, $currentYear);
    }