Given a time, how can I find the time one month ago

Question

Given a time, how can I find the time one month ago.

Answer 1

<?php

$date = new DateTime("18-July-2008 16:30:30");
echo $date->format("d-m-Y H:i:s").'<br />';

date_sub($date, new DateInterval("P1M"));
echo '<br />'.$date->format("d-m-Y").' : 1 Month';

?>