PHP cal_days_in_month() function

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In this article, you will learn how to get the number of days in the month of a certain year. The cal_days_in_month() function returns the number of days of the given month and the given year of the calendar.

What is the syntax of the cal_days_in_month() function in PHP?

cal_days_in_month(calendar,month,year);
ParametersDetails
calendarThe calendar to follow – Required
monthThe month (numeric number) – Required
yearThe specific year to consider the month in – Required
PHP cal_days_in_month() function

Examples of cal_days_in_month() function

Example 1. Get the number of days for the specified month, year and calendar.

<?php
$days=cal_days_in_month(CAL_GREGORIAN,01,2021);
echo "Days in January 2021: " $days;
?>
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