(PHP 4 >= 4.1.0, PHP 5, PHP 7)
cal_days_in_month — 锟斤拷锟斤拷某锟斤拷锟斤拷锟斤拷锟斤拷某锟斤拷锟斤拷某锟铰碉拷锟斤拷锟斤拷
$calendar
, int $month
, int $year
) : int
锟矫猴拷锟斤拷锟斤拷锟斤拷锟截讹拷锟斤拷锟斤拷锟叫碉拷某锟斤拷锟叫碉拷某锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
calendar锟斤拷锟斤拷锟斤拷锟斤拷锟侥筹拷锟斤拷锟斤拷锟�
month选锟斤拷锟斤拷锟斤拷锟叫碉拷某锟斤拷
year选锟斤拷锟斤拷锟斤拷锟叫碉拷某锟斤拷
指锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷锟斤拷某锟铰碉拷锟斤拷锟斤拷锟斤拷
Example #1 cal_days_in_month() example
<?php
$num = cal_days_in_month(CAL_GREGORIAN, 8, 2003); // 31
echo "There was $num days in August 2003";
?>