Mine

<?php
	function AttendanceDuration($date) {
		$diff = $date - time();
		$days = ($diff - ($diff % 86400)) / 86400;
		$diff = $diff - ($days * 86400);
		$hours = ($diff - ($diff % 3600)) / 3600;
		$diff = $diff - ($hours * 3600);
		$minutes = ($diff - ($diff % 60)) / 60;
		$diff = $diff - ($minutes * 60);
		$seconds = ($diff - ($diff % 1)) / 1;
		return "{$days}d {$hours}h {$minutes}m {$seconds}s";
	}
?>