Metro_Sitemap::find_valid_days PHP Method

    public static function find_valid_days($year)
    {
        $days = 31;
        if ($m == 2) {
            $days = date('L', strtotime($year . '-01-01')) ? 29 : 28;
            // leap year
        } elseif ($m == 4 || $m == 6 || $m == 9 || $m == 11) {
            $days = 30;
        }
        if ($m == date('m')) {
            $days = date('d');
        }
        return $days;
    }