Boundaries enum example

boundaries.php

<?php

enum Boundaries
{
    case includeNone;
    case includeStart;
    case includeEnd;
    case includeAll;

    public function startIncluded(): bool
    {
        return match ($this) {
            self::includeStart, self::includeAll => true,
            default => false,
        };
    }

    public function endIncluded(): bool
    {
        return match ($this) {
            self::includeEnd, self::includeAll => true,
            default => false,
        };
    }
}