获取某个月的最后一天或某个月的天数

2015/01/08 42078

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//获取某个月的最后一天或某个月的天数
function getMonthLastDay ( $month, $year )
{
    switch ( $month )
    {
    case 4 :
    case 6 :
    case 9 :
    case 11 :
        $days = 30;
        break;
    case 2 :
        if ( $year % 4 == 0 )
        {
            if ( $year % 100 == 0 )
            {
                $days = $year % 400 == 0 ? 29 : 28;
            }
            else
            {
                $days = 29;
            }
        }
        else
        {
            $days = 28;
        }
        break;
 
    default :
        $days = 31;
        break;
    }
    return $days;
}