In this new tutorial from DevShed, they show how to take that PHP-GTK introductory knowledge a step further and create a simple desktop "notepad" application (corss-platform, of course).
If you think building a desktop application such as Notepad is difficult, think again. If you use PHP-GTK, it's almost ridiculously easy. This article will show you how. By the time you're done, you'll have a full cross-platform application in about 100 lines.
You need to already have the latest PHP-GTK version installed and have a basic knowledge of how to make an application before you start. All code is included as well as explanations as to where all of the parts go (including a simple find, time/date output, select all and how to tell if the user has modified the contents of the file).