Can someone help me with a simple fix about my code of an simple function? thanks before!! Im getting that error into my logs: PHP Notice: Undefined index: ID
    function hasMembership($odb) {
        $SQL = $odb -> prepare("SELECT `expire` FROM `users` WHERE `ID` = :id");
        $SQL -> execute(array(':id' => $_SESSION['ID']));
        $expire = $SQL -> fetchColumn(0);
        if (time() < $expire)
        {
            return true;
        }
        else
        {
            $SQLupdate = $odb -> prepare("UPDATE `users` SET `membership` = 0 WHERE `ID` = :id");
            $SQLupdate -> execute(array(':id' => $_SESSION['ID']));
            return false;
        }
    }
