As PHP-GTK2 is fairly new on the scene, there aren’t many resources for learning it. Those that are, are scattered throughout the web. Ive compiled a list below, hopefully they can help you develop PHP-GTK2 applications.

• kksou - Sample Codes, Hundreds of code examples with explanations.
• kksou - Blog, Some nice advanced info, updated frequently.
• kksou - Forums, Can ask for help on your codes.
• Gnope, Installation of PHP-GTK2.
• cweiske, Some PHP-GTK1 resources, you may/may not find it useful for PHP-GTK2 development.
• gtk.php.net, Official PHP-GTK2 homepage, numerous links, source code.
• gtk.php.net docs, Official PHP-GTK2 documentation.
• gtk.php.net FAQ, Frequently Asked Questions.
• gtk.php.net Resources, PHP-GTK2 mailing list, more resources.
• php-gtk.eu, Great support forum, samples,news.
• activenture, Docs, Refs, Tutorials. Very good.
• php-gtk.eu apps, Largest list (that i could find) of PHP-GTK2 apps.