how to get the number of days of the current month in PHP ?

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.

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

More details


example

             $m1=date('Y-m-d',strtotime($date_of_join));            
           
             $mon_num = date("m",strtotime($m1));
             $curr_year = date("Y",strtotime($m1));

            $num = cal_days_in_month(CAL_GREGORIAN, $mon_num, $curr_year);

PHP code for find number of days form given month and year ?

<?php

$month = 2;
$year = 2020;

$days = $month == 2 ? ($year % 4 ? 28 : ($year % 100 ? 29 : ($year % 400 ? 28 : 29))) : (($month - 1) % 7 % 2 ? 30 : 31);

echo $days;

?>