cal_days_in_month

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

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

Description

function cal_days_in_month(int $calendar, int $month, int $year): int

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

Parameters

calendar: Calendar to use for calculation
month: Month in the selected calendar
year: Year in the selected calendar

Return Values

The length in days of the selected month in the given calendar

Errors/Exceptions

Throws a ValueError if calendar is not a valid calendar ID, if month or year is outside the supported range, or if the date is not valid in the given calendar.

Changelog

Version	Description
8.0.0	Now throws a ValueError if `calendar` is not a valid calendar ID or the date is not valid. Previously, an `E_WARNING` was raised and `false` was returned.

Examples

Example #1 cal_days_in_month() example

<?php
$number = cal_days_in_month(CAL_GREGORIAN, 8, 2003); // 31
echo "There were {$number} days in August 2003";
?>