Creating Basic GTK Objects
The GTK+ extension is an object oriented programming (OOP) extension to PHP. You need to use OOP syntax and structures to use the GTK+ library. If you haven't already done so, you may want to go all the way back to Chapter 1 and review the material about OOP in PHP.
Creating Your First PHPGTK Window
Before you can create any PHPGTK applications, you must tell PHP which GTK library you want to use. Since GTK runs on Windows and many flavors of UNIX, that leaves us with two types of libraries. Windows uses dynamic link libraries, also called DLLs. Most *nix based operating systems use .so libraries. Since you want your application to be able to be used on both types of operating systems without modification, you must ...