public function getendmouthtime()
{
$date=date("Y-m",time());
$date_arr=explode(‘-‘,$date);
$year=$date_arr[0];
$month=$date_arr[1];
$days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
if ($month < 1 OR $month > 12)
{
return 0;
}
// Is the year a leap year?
if ($month == 2)
{
if ($year%400 == 0 OR ($year%4 == 0 AND $year%100 != 0))
{
return $year.‘-‘.$month.‘-29‘;
}
}
return $endstro = strtotime($year.‘-‘.$month.‘-‘.$days_in_month[$month - 1]);
}
原文：http://my.oschina.net/jyb2014/blog/356275