cal_days_in_month() 函数针对指定的年份和日历,返回一个月中的天数。
cal_days_in_month(calendar,month,year)
<?php $d=cal_days_in_month(CAL_GREGORIAN,10,2005); echo("There was $d days in October 2005"); ?>
输出:
There was 31 days in October 2005