I have a php code as shown below in which I want to display anything in between two calendar days of the week.
The values coming inside $data->{\"select_s         
        
At first, I can recommend you use Object-oriented programming to better structuration of your code and decomposition of the task. You can create an abstraction to work with the weekday time. For example:
class WeekDayTime
{
    /** @var string[] map of the name of days and their number */
    const DAY_MAP = [
        'Mon' => 1,
        'Tue' => 2,
        'Wed' => 3,
        'Thu' => 4,
        'Fri' => 5,
        'Sat' => 6,
        'Sun' => 7
    ];
    /** @var int number of the day */
    private $dayNumber;
    /** @var int amount of hours */
    private $hours;
    /** @var int amount of minutes */
    private $minutes;
    /** @var int amount of seconds */
    private $seconds;
    /**
     * Constuctor
     * @param string $day number of the day
     * @param int $hours amount of hours
     * @param int $minutes amount of minutes
     * @param int $seconds amount of seconds
     */ 
    public function __construct(string $day, int $hours, int $minutes, int $seconds)
    {
        assert(array_key_exists($day, static::DAY_MAP), 'The day is incorrect');
        assert($hours < 24, 'The hours must be less than 24');
        assert($minutes < 60, 'The hours must be less than 60');
        assert($seconds < 60, 'The hours must be less than 60');
        $this->dayNumber = static::DAY_MAP[$day];
        $this->hours = $hours;
        $this->minutes = $minutes;
        $this->seconds = $seconds;
    }
    /**
     * Get number of the day
     * @return int number of the day
     */
    public function getDayNumber(): int
    {
        return $this->dayNumber;
    }
    /**
     * Get amount of hours
     * @return int amount of hours
     */
    public function getHours(): int
    {
        return $this->hours;
    }
    /**
     * Get amount of minutes
     * @return int amount of minutes
     */
    public function getMinutes(): int
    {
        return $this->minutes;
    }
     /**
     * Get amount of seconds
     * @return int amount of seconds
     */
    public function getSeconds(): int
    {
        return $this->seconds;
    }
    /**
     * Check if the current week day time is less the a denined week day time
     * @param WeekDayTime $value value which will be compared
     * @return bool status of the checking
     */
    public function isLessOrEqual(WeekDayTime $value): bool
    {
        $isLess = $this->dayNumber < $value->dayNumber;
        $isLessOrEqual = $this->dayNumber === $value->getDayNumber()
            && $this->hours <= $value->getHours()
            && $this->minutes <= $value->getMinutes()
            && $this->seconds <= $value->getSeconds();
        return $isLess || $isLessOrEqual;
    }
    /**
     * Check if the current week day time is greater the a denined week day time
     * @param WeekDayTime $value value which will be compared
     * @return bool status of the checking
     */
    public function isGreaterOrEqual(WeekDayTime $value): bool
    {
        $isGreater = $this->dayNumber > $value->dayNumber;
        $isGreaterOrEqual = $this->dayNumber === $value->getDayNumber()
            && $this->hours >= $value->getHours()
            && $this->minutes >= $value->getMinutes()
            && $this->seconds >= $value->getSeconds();
        return $isGreater || $isGreaterOrEqual;
    }
}
It will be the object-value which will have information about the day of week and time and methods to compare objects of this class. After it, you can create a class to contain a range of weekday time. For example:
class WeekDayTimeRange
{
    /** WeekDayTime range start */
    private $start;
    /** WeekDayTime range end */
    private $end;
    /**
     * Constuctor
     * @param WeekDayTime $start range start
     * @param WeekDayTime $end range end
     */
    public function __construct(WeekDayTime $start, WeekDayTime $end)
    {
        $this->start = $start;
        $this->end = $end;
    }
    /**
     * Check if a date-time occurs into the range
     * @param DateTimeInterface the date-time which will be checked
     * @return bool status of the checking
     */
    public function inRange(DateTimeInterface $dateTime): bool
    {}
}
As can you see this class has information about range start, range end and method to check the occurrence of any date-time into the range. If you want to check the occurrence into a range which has start value less then end value (for example from Monday to Friday) you can do the following implementation of inRange method:
public function inRange(DateTimeInterface $dateTime): bool
{
    $day = $dateTime->format('D');
    $hours = $dateTime->format('H');
    $minutes = $dateTime->format('i');
    $seconds = $dateTime->format('s');
    $weekDayTime = new WeekDayTime($day, $hours, $minutes, $seconds);
    return $this->start->isLessOrEqual($weekDayTime) && $this->end->isGreaterOrEqual($weekDayTime);
}
But if you want to check the occurrence into a range which has start value greater then end value (for example from Friday to Monday) you should break range to two ranges: from range start to week end and from week start to range end and to check the occurrence of the date-time into both ranges. For example:
public function inRange(DateTimeInterface $dateTime): bool
{
    $day = $dateTime->format('D');
    $hours = $dateTime->format('H');
    $minutes = $dateTime->format('i');
    $seconds = $dateTime->format('s');
    $weekDayTime = new WeekDayTime($day, $hours, $minutes, $seconds);
    // if the range end is less then range start we break the current range to two range
    if ($this->end->isLessOrEqual($this->start))  {
        $range1 = new WeekDayTimeRange($this->start, new WeekDayTime('Sun', 23,59,59));
        $range2 = new WeekDayTimeRange(new WeekDayTime('Mon', 0,0,0), $this->end);
        return $range1->inRange($dateTime) || $range2->inRange($dateTime);
    }
    return $this->start->isLessOrEqual($weekDayTime) && $this->end->isGreaterOrEqual($weekDayTime);
}
Example of using:
// Date occurs into the range from Tuesday to Friday
$start = new WeekDayTime('Tue', 10, 0,0);
$end = new WeekDayTime('Fri', 14, 0,0);
$range = new WeekDayTimeRange($start, $end);
$range->inRange(DateTime::createFromFormat('Y-m-d H:i:s', '2019-10-03 10:00:00'));
// Date doesn't occur into the range from Tuesday to Friday
$start = new WeekDayTime('Tue', 10, 0,0);
$end = new WeekDayTime('Fri', 14, 0,0);
$range = new WeekDayTimeRange($start, $end);
$range->inRange(DateTime::createFromFormat('Y-m-d H:i:s', '2019-10-05 10:00:00'));
// Date doesn't occur into the range from Friday to Tuesday
$start = new WeekDayTime('Fri', 14, 0,0);
$end = new WeekDayTime('Tue', 10, 0,0);
$range = new WeekDayTimeRange($start, $end);
$range->inRange(DateTime::createFromFormat('Y-m-d H:i:s', '2019-10-03 10:00:00'));
// Date occurs into the range from Friday to Tuesday
$start = new WeekDayTime('Fri', 14, 0,0);
$end = new WeekDayTime('Tue', 10, 0,0);
$range->inRange(DateTime::createFromFormat('Y-m-d H:i:s', '2019-10-05 10:00:00'));
You can see demo at sandbox