- date_diff: documentation ( source)
- var_dump: documentation ( source)
- date_default_timezone_set: documentation ( source)
<?php
date_default_timezone_set('Zulu');
$start = new DateTime("10/12/2013 16:00");
$end = new DateTime("10/13/2014 16:00");
$interval = date_diff($start, $end);
$time_interval = new DateInterval("P1W");
$a = $interval > $time_interval;
var_dump($interval);
$b = $interval > $time_interval;
var_dump($a == $b);