Comparing timestamps - Finding the oldest

If I had 10 variables that were holding 10 different timestamps, and I wanted to compare them so I could find out which variable was holding the oldest timestamp, how would I go about doing that?

easiest way is to put thme in an array the simply sort the array

$time_ts[] = first timestamp;
$time_ts[] = 2nd timestamp;
etc

then

sort($time_ts);

and presuming you have 10 items

$i= 0;
for ($i = 0; $i < 10; $i ++) {
echo $time_ts[$i];
}

you can also use min() to find the lowest value


<?
echo min( $time_ts ) ;
?>