(PHP 4 >= 4.1.0, PHP 5)

cal_days_in_month -- Return the number of days in a month for a given year and calendar

Description

int cal_days_in_month ( int calendar, int month, int year )

This function will return the number of days in the month of year for the specified calendar.

例子 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"; ?>

See also jdtounix().