date intervals for PHP < 5.3

intervals.php

<?php
function intervals($start, $end = 'now')
{
	$unixStart = strtotime($start);
	$unixNow = strtotime($end);
	$diff = $unixNow - $unixStart;
	
	$days = (int) ($diff / 86400);
	$hours = (int) ($diff / 3600);
	$minutes = (int) ($diff / 60);
	$seconds = $diff;
	
	$mod_days = $days;
	$mod_hours = ($hours%24);
	$mod_minutes = ($minutes%60);
	$mod_seconds = ($seconds%60);
	
	return array(
		'total_days' => $days,
		'total_hours' => $hours,
		'total_minutes' => $minutes,
		'total_seconds' => $seconds,
		'days' => $mod_days,
		'hours' => $mod_hours,
		'minutes' => $mod_minutes,
		'seconds' => $mod_seconds
	);
}