MethodSchedule::parseDaysOfMonth

static function parseDaysOfMonth($daysOfMonth)
{
	$result = [];
	if ($daysOfMonth <> '')
	{
		$days = explode(",", $daysOfMonth);
		$found = [];
		foreach ($days as $day)
		{
			$day = trim($day);
			if (preg_match("/^(d{1,2})$/", $day, $found))
			{
				if (intval($found[1]) < 1 || intval($found[1]) > 31)
				{
					return [];
				}
				else
				{
					$result[] = intval($found[1]);
				}
			}
			elseif (preg_match("/^(d{1,2})-(d{1,2})$/", $day, $found))
			{
				if (intval($found[1]) < 1 || intval($found[1]) > 31 || intval($found[2]) < 1 || intval($found[2]) > 31 || intval($found[1]) >= intval($found[2]))
				{
					return [];
				}
				else
				{
					for ($i = intval($found[1]); $i <= intval($found[2]); $i++)
					{
						$result[] = intval($i);
					}
				}
			}
			else
			{
				return [];
			}
		}
	}
	else
	{
		return [];
	}

	return $result;
}