<?php

function since($year, $month, $day, $hour, $minute)
{
        $born = mktime($hour, $minute, 0, $month, $day, $year, -1);

        $today = time();

        $diff = $today - $born;
	if ($diff < 0) $diff = 0;

	$days_since = floor($diff/60/60/24);
	$hours_since = floor(($diff - $days_since*60*60*24)/60/60);
	$minutes_since = floor(($diff - $days_since*60*60*24 - $hours_since*60*60)/60);

	echo "".$days_since. " days " .$hours_since. " hours " .$minutes_since. " minutes";

}

echo since($year, $month, $day, $hour, $minute);

?>