/**
* Does another range start before this one does?
*
* @param DateRange $other_range
* @return bool True if the other range starts before this one.
*/
function startsBefore($other_range)
{
$this_start = $this->getStartDate();
$other_start = $other_range->getStartDate();
return $this_start->before($other_start);
}
/**
* @param DateRange $dateRange
* @return string
*/
public static function toString(DateRange $dateRange)
{
return sprintf('[%s,%s]', $dateRange->getStartDate()->format('Y-m-d'), $dateRange->getEndDate()->format('Y-m-d'));
}