The key to getting the last date of a month is the letter t. When used with PHP’s date function, the letter t acts as a format character that returns the number of days that are in a given month. code example

Example 1: date in php

<?php
// prints something like: Wednesday the 15th
echo date('l \t\h\e jS');
?>
gmdate() - Format a GMT/UTC date/time
idate() - Format a local time/date as integer
getdate() - Get date/time information
getlastmod() - Gets time of last page modification
mktime() - Get Unix timestamp for a date
strftime() - Format a local time/date according to locale settings
time() - Return current Unix timestamp
DateTimeImmutable::__construct() - Returns new DateTimeImmutable object
Predefined DateTime Constants

Example 2: date in php

<?php
// set the default timezone to use. Available since PHP 5.1
date_default_timezone_set('UTC');


// Prints something like: Monday
echo date("l");

// Prints something like: Monday 8th of August 2005 03:12:46 PM
echo date('l jS \of F Y h:i:s A');

// Prints: July 1, 2000 is on a Saturday
echo "July 1, 2000 is on a " . date("l", mktime(0, 0, 0, 7, 1, 2000));

/* use the constants in the format parameter */
// prints something like: Wed, 25 Sep 2013 15:28:57 -0700
echo date(DATE_RFC2822);

// prints something like: 2000-07-01T00:00:00+00:00
echo date(DATE_ATOM, mktime(0, 0, 0, 7, 1, 2000));
?>