how to get last date of last month in php code example

Example 1: get last month php

$currentMonth = date('M');// if number, then date('m');
//Last month
$lastMonth = Date("F", strtotime("first day of previous month");
$nextMonth = Date("F", strtotime("first day of next month");

Example 2: last day of previous month in php

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

print_r($lastDay);