According to this new post from Scott Mattocks today, there's a new article in a new section of the php|archtiect site detailing the evolution of PHP-GTK.
This article is a first in a series of PHP-GTK articles. My goal is to start with PHP developers that have never heard of PHP-GTK and slowly but surely get them to the point where they can develop their own PHP-GTK apps with minimal headaches. Part one of this series doesn't jump into any development. It simply gives a bit of background. This article explains where PHP-GTK came from and how it can be useful in the real world. As always, I welcom comments, ideas and suggestions, not just about this article but also about future articles that you would like to see written.
The article looks at PHP-GTK from its humblest beginnings (the filesystem functions) out to what it is and what it's used for. There's also a brief discussion of where it's headed as well, including links to a few different resources on the topic.