How to get last day of the month using php [duplicate]

Question

How to get last day of the month using php ?

<?php
     echo date('?-?-?');
?>

Answer 1

try this

$day=date('Y-m-t'); // gives last day of current month

OR

$d = new DateTime( '2013-05-03' ); 
echo $d->format( 'Y-m-t' );

Answer 2

<?php
$day=new DateTime('last day of this month'); 
echo $day->format('M jS');
?>

Answer 3

The date function documentation says that t represents number of days in current month:

$day = date( 't-m-Y' );