function difference($start, $quanity = 2)
{
	$seconds = TIMENOW - strtotime($start);

	$time['week'] = floor($seconds / 604800);
	$seconds = $seconds % 604800;

	$time['day'] = floor($seconds / 86400);
	$seconds = $seconds % 86400;

	$time['hour'] = floor($seconds  / 3600);
	$seconds = $seconds % 3600;

	$time['minute'] = floor($seconds / 60);
	$time['second'] = $seconds % 60;

	$i = 1;
	foreach($time as $index => $value)
    { 
		if ($i > $quanity) break;

		elseif ($value != 0)
        {
			$index .= ($value > 1) ? 's' : NULL;
			$str .= (isset($str)) ? ", $value $index" : "$value $index";
			$i++;
		}
	}

	return $str;
}