wtf

            if ($dt) {
                $dt_week_day = (int) date("w", mktime(0, 0, 0, substr($dt, 4, 2), substr($dt, 6, 2), substr($dt, 0, 4)));

                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$weekday1 && !$weekday2 && !$weekday3 && !$weekday4 && !$weekday5 && !$weekday6 && !$weekday7)
                        $ok = 1;
                if (!$datefrom && !$dateto && $permanent == "on" && !$weekday1 && !$weekday2 && !$weekday3 && !$weekday4 && !$weekday5 && !$weekday6 && !$weekday7)
                        $ok = 1;
                if ($datefrom && !$dateto && $dt <= $datefrom) $ok = 1;

                if (!$datefrom && !$dateto && $permanent == "on" && $weekday1 > 0 && $dt_week_day == 1)
                        $ok = 1;
                if (!$datefrom && !$dateto && $permanent == "on" && $weekday2 > 0 && $dt_week_day == 2)
                        $ok = 1;
                if (!$datefrom && !$dateto && $permanent == "on" && $weekday3 > 0 && $dt_week_day == 3)
                        $ok = 1;
                if (!$datefrom && !$dateto && $permanent == "on" && $weekday4 > 0 && $dt_week_day == 4)
                        $ok = 1;
                if (!$datefrom && !$dateto && $permanent == "on" && $weekday5 > 0 && $dt_week_day == 5)
                        $ok = 1;
                if (!$datefrom && !$dateto && $permanent == "on" && $weekday6 > 0 && $dt_week_day == 6)
                        $ok = 1;
                if (!$datefrom && !$dateto && $permanent == "on" && $weekday7 > 0 && $dt_week_day == 0)
                        $ok = 1;

                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$permanent && $weekday1 > 0 && $dt_week_day == 1)
                        $ok = 1;
                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$permanent && $weekday2 > 0 && $dt_week_day == 2)
                        $ok = 1;
                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$permanent && $weekday3 > 0 && $dt_week_day == 3)
                        $ok = 1;
                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$permanent && $weekday4 > 0 && $dt_week_day == 4)
                        $ok = 1;
                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$permanent && $weekday5 > 0 && $dt_week_day == 5)
                        $ok = 1;
                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$permanent && $weekday6 > 0 && $dt_week_day == 6)
                        $ok = 1;
                if ($datefrom && $dateto && $dt >= $datefrom && $dt <= $dateto && !$permanent && $weekday7 > 0 && $dt_week_day == 0)
                        $ok = 1;

                if ($ok == 0) continue;
            }