calculations with date

[jas4]

hi i've got 2 date values, both in the format yyyy-mm-dd, has anyone any ideas how to perform a calculation, so that I can take one date away from the other and be left with the days/difference between

 

thanks

[Lumio]

<?php
$date1 = "2006-05-24";
$date2 = "2007-05-24";

$different = strtotime($date2)-strtotime($date1);
echo $different.'secs';
?>