Random XML values in PHP

programming
1

I am basically a Flash programmer dabbling in PHP.

Now what I am tying to create is a PHP file that communicates between XML and Flash. My XML file has around 100 values and I want the PHP file to randomly pick any 10 and pass them on to Flash.

How do you go about picking any 10 values from the 100.

eg.
<file>
<num>1</num>
<num>2…
</file>

Now I want PHP to pick up any 10 <num> values from the 100 which are entered.