Руководство по написанию расширений для PHP.

If you're reading this tutorial, you probably have some interest in writing an extension for the PHP language. If not... well perhaps when we're done you'll have discovered an interest you didn't know existed!

Руководство по написанию сокет сервера на PHP.

This tutorial is intended for the PHP programmer interested in exploring the use of PHP Sockets functions to create an Internet Socket Server.

Один из самых больших российский форумов для PHP программистов.