Getting last month's date in php

Question

I want to get last month\'s date. I wrote this out:

$prevmonth = date(\'M Y\');

Which gives me the current month/year. I can\'t tell if I

Answer 1

echo date('Y',strtotime("-1 year"));        //last year

echo date('d',strtotime("-1 day"));     //last day

echo date('m',strtotime("-1 month"));       //last month