Verified answer

Nothing visual will be PHP, unless you are using PHP to grab the photographs.

jQuery is the language to use when making a lightbox.

The site to learn jQuery at is http://www.jquery.com/

However, there are lightbox scripts that can be found on google. Just takes a little typing to find them =]

dynamicdrive.com may also have a regular javascript one.

Good Luck!

If you have any other questions, feel free to email me.