Morilog\Jalali\jDateTime::getDayNames PHP Method

    private static function getDayNames($day, $shorten = false, $len = 1, $numeric = false)
    {
        switch (strtolower($day)) {
            case 'sat':
            case 'saturday':
                $ret = 'شنبه';
                $n = 1;
                break;
            case 'sun':
            case 'sunday':
                $ret = 'یکشنبه';
                $n = 2;
                break;
            case 'mon':
            case 'monday':
                $ret = 'دوشنبه';
                $n = 3;
                break;
            case 'tue':
            case 'tuesday':
                $ret = 'سه شنبه';
                $n = 4;
                break;
            case 'wed':
            case 'wednesday':
                $ret = 'چهارشنبه';
                $n = 5;
                break;
            case 'thu':
            case 'thursday':
                $ret = 'پنجشنبه';
                $n = 6;
                break;
            case 'fri':
            case 'friday':
                $ret = 'جمعه';
                $n = 7;
                break;
            default:
                $ret = '';
                $n = -1;
        }
        return $numeric ? $n : ($shorten ? mb_substr($ret, 0, $len, 'UTF-8') : $ret);
    }