PHP: Hypertext Preprocessor:PHP is a server-side HTML embedded scripting language. It provides web developers with a full suite of tools for building dynamic websites: native APIs to Apache and other web servers; easy access to MySQL, Sybase, Oracle, and other databases; IMAP; LDAP; HTTP headers and cookies. This site is the official home of PHP4.
Zend:A bottom-up rewrite of the PHP scripting engine. It features a modular architecture, vastly improved performance, and greater scalability.
Codewalkers: A community site dedicated to PHP and SQL. Includes user submitted code, tutorials and forums.
CodingTheWeb: PHP News: PHP development news, tutorials, and technical articles. Available as XML and RSS feeds.
International PHP Magazine: Web-based magazine for Web professionals focused on PHP based development. News, online articles, book reviews, forum.
Making the Case for PHP at Yahoo!: Slides from a talk where Michael J. Radwin makes the case for using PHP over other languages.
PHP Club: A programmer's group united by a desire to develop PHP technologies in the Internet. News, articles, applications and FAQ.
PHP Everywhere: John Lim's weblog with comments and reviews. Links to his longer articles and manuals.
PHP Freaks: A community designed to assist developers with PHP and MySQL related information. Includes tips, tutorials, forums, articles, code examples and manuals.
PHP Magazine Blogs: A community of PHP authors. You can start own PHP blog.
PHPit: PHP and MySQL articles, tutorials and codesnippets. It also has database with commonly asked questions.
PHPMac.com: Dedicated to PHP programmers that use the Mac OS, in particular Apple's OS X unix system. Tutotials, articles and support.
Quality Assurance Team: Voulonteer coders dedicated to providing coders with quality assurance.
ThePHPGuy: PHP, MySQL and Apache articles, tutorials, guides and a free help forum. Free PHP scripts and programming tips and tricks.