Prado\Util\TDateTimeStamp::isValidDate PHP Метод

    public function isValidDate($y, $m, $d)
    {
        if ($this->isLeapYear($y)) {
            $marr =& self::$_month_leaf;
        } else {
            $marr =& self::$_month_normal;
        }
        if ($m > 12 || $m < 1) {
            return false;
        }
        if ($d > 31 || $d < 1) {
            return false;
        }
        if ($marr[$m] < $d) {
            return false;
        }
        if ($y < 1000 && $y > 3000) {
            return false;
        }
        return true;
    }