Validates user's input date.

ValidateDate

protected function checkInputDate($string)
{
	$try = date_parse($string);
	if ($try['error_count'] > 0)
		return false;

	try { $try = new DateTime($string); }
	catch (Exception $e) { return false; }

	$sep = '-.\/';
	if(preg_match("/[^0-9$sep]+/", $string) == 1)
		return false;

	if(preg_match("/[$sep]/", $string) == 0)
		return false;

	if (count(preg_split("/[$sep]/", $string)) != 3)
		return false;

	if (strtotime($string) === false)
		return false;

	return true;
}