timestamps are great, they are the universal computer time format that consists only of seconds so there is no way that they will have any compatibility problems because there is no formatting to get in the way. Thats my rant, now here is the code you are looking for:
// puts the current time stamp into a variable:
$time = time();
// turn the timestamp into DD/MM/YYYY format:
$time_format = date('d/m/Y', $time);
//dispay this new formatted date:
echo $time_format;
for more information on PHP date/time functions, visit:
http://www.php.net/manual/en/ref.datetime.php