AppController::session_maintain PHP Method

    function session_maintain()
    {
        $this->layout = 'ajax';
        $sessionout = 0;
        if ($_COOKIE['USER_UNIQ']) {
            setcookie('USER_UNIQ', $_COOKIE['USER_UNIQ'], COOKIE_TIME, '/', DOMAIN_COOKIE, false, false);
            setcookie('USERTYP', $_COOKIE['USERTYP'], COOKIE_TIME, '/', DOMAIN_COOKIE, false, false);
            setcookie('USERTZ', $_COOKIE['USERTZ'], COOKIE_TIME, '/', DOMAIN_COOKIE, false, false);
        } else {
            $sessionout = 1;
        }
        echo $sessionout;
        exit;
    }