cal_days_in_month
(PHP 4 >= 4.1.0, PHP 5, PHP 7)
cal_days_in_month — Return the number of days in a month for a given year and calendar
Description
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
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";
?>
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https://www.php.net/manual/en/function.cal-days-in-month.php