The Developer Tutorial site has an introduction to PHP-GTK2 posted - an overview of what the new version (version 2) is and how you can install and use it to develop desktop applications.

PHP-GTK 2 is out, and with it, a fantastic means for PHP developers to build useful, reliable cross-platform desktop applications. In this tutorial, I'll show you how to get up and running with PHP-GTK in no time and build your first desktop application.

They look at qhat it is, getting started with it and making your first application (a simple little "Hello World" output box). They also point out some of the demos you can grab as examples and show you how to make something a little more powerful - a window with an input form that generates an md5 hash.

Knut Urdalen has come back to PHP-GTK2 (since trying it back in the alpha stage) and decided to give it a shot by porting over an application and seeing how easy it was.

I wanted to see how easy I can take a simple GTK application written in another language and port it to PHP-GTK2. I ended up porting this Ruby/Gtk example written by Daniel Lichtenberger which have some logic, dialogs, events and some graphics.

His experience was a pleasant one, finding that most of the code came over easily, if not directly (well, with syntax chnages, of course). There were a few issues with pulling in the graphics, but over all, it went well. If you'd like to check out the source for the game, you can download it here and (with PHP-GTK2 installed) run it with a simple "php tictactoe.phpw" command.