PHP Magazine - The Software & Support Verlag magazine on PHP. Published bi-monthly (English)
Zend - A bottom-up rewrite of the PHP scripting engine. It features a modular architecture, and vastly improved performance.
NewsForge: The Online Newspaper for Linux and Open Source - A great number of open source PHP projects actively developed
How to Configure PHP with Apache on Windows - How to guide to installing and configuring PHP4 (PHP version 4) to run with the Apache web server on Windows
DevShed - PHP - PHP Help, PHP Programming, PHP Code, PHP Tutorials at Dev Shed! Learn to create and modify your website using the latest PHP Development tips and tricks.
O'Reilly Network: PHP DevCenter - O'Reilly Network's source for PHP developer news and information.
PHP Mac - The largest site totally dedicated to running PHP on the Mac. With many in dept articles and tutorials that cover everything from Building PHP to using MySQL and Apache 2; PHPmac has it.
PREMIUM LISTINGS
