PHP

last day of previous month in php

$lastDay = date('t',strtotime('last month'));

print_r($lastDay);

php last day of month

$a_date = "2009-11-23";
echo date("Y-m-t", strtotime($a_date));

php get last day of month

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

check if is the last day of the month php

if(gmdate('t') == gmdate('d')){
    echo 'Last day of the month.';
}