php根据年月获取当月天数。

function get_day( $date )   
{
        $tem = explode('-' , $date);       //切割日期  得到年份和月份
        $year = $tem['0'];
        $month = $tem['1'];
        if( in_array($month , array( 1 , 3 , 5 , 7 , 8 , 01 , 03 , 05 , 07 , 08 , 10 , 12)))
        {
            // $text = $year.'年的'.$month.'月有31天';
            $text = '31';
        }
        elseif( $month == 2 )
        {
            if ( $year%400 == 0  || ($year%4 == 0 && $year%100 !== 0) )        //判断是否是闰年
            {
                // $text = $year.'年的'.$month.'月有29天';
                $text = '29';
            }
            else{
                // $text = $year.'年的'.$month.'月有28天';
                $text = '28';
            }
        }
        else{

            // $text = $year.'年的'.$month.'月有30天';
            $text = '30';
        }
        return $text;
}

echo get_day('2016-8-1');

改造，返回日期数组

param$dateparam$rtype12returnfunction$date$rtype'1'$tem'-'$date$year$tem'0'$month$tem'1'if$month1357801030507081012$text$year'年的'$month'月有31天'$text'31'elseif$month2if$year4000$year40$year1000$text$year'年的'$month'月有29天'$text'29'else$text$year'年的'$month'月有28天'$text'28'else$text$year'年的'$month'月有30天'$text'30'if$rtype'2'for$i1$i$text$i$r$year"-"$month"-"$ielse$r$textreturn$r'2016-8-1''2'