Is this PHP? Not really sure how to do this?

I have several folders of photos neatly organized. All photos have different names but end in .jpg. 

Folder could be called 03, 04, tom, jen, empire, etc

if user clicks 03 link all photos would be shown in the 03 folder 

for example:

http://www.lukeandleroy.com/wp-content/uploads/2011/03/

i want a page to show all in that folder whether there is 1 or 20 pics and regardless of name of photo.