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.
Club of the Developers - This is a site of programmer's group united by a desire to develop PHP technologies in Internet.
Codewalkers - A community site dedicated to PHP and SQL. Includes user submitted code, tutorials and forums.
PHP Everywhere - Articles on PHP on Windows and Linux. Also compares PHP to ASP, Cold Fusion and Perl.
PHP Freaks - A community designed to assist developers with PHP and MySQL related information. Includes tips, tutorials, forums, articles, code examples and manuals.
PHP News by CodingTheWeb.com - PHP development news, tutorials, technical articles and HOWTOs. This is the definitive news source for PHP. Updated hourly.
PHPMac.com - A site dedicated to PHP programmers that use the Mac OS. In particular Apple's new OS X unix system.
Quality Assurance Team - Voulonteer coders dedicated to providing coders with quality assurance.
ThePHPGuy - PHP, MySQL and Apache articles, tutorials, guides. Also features daily updated developer news as well as a monthly developer newsletter packed with PHP programming tips and tricks.
Wrox Resource Center - PHP support and resource forums run by programmers for programmers, provided by Wrox Press.
PHP Manual - Complete and hyperlinked manual documents and explains all elements of PHP. Includes FAQ section and user comments.
caiPHP - Tutorials and code snips directed to those who are learning PHP.
Classes and PHP (PHPBuilder) - A description in plain English of what classes are, and how they can make your project easier to complete and extend.
Comprehensible PHP Code (PHPBuilder) - A good programmer makes her code look so simple and comprehensible that any other programmer can understand it and appreciate it.
Database Abstraction With PHP - Take a look at the PEAR database abstraction layer, one of the coolest PHP widgets out there.
Database Enabled Websites - A tutorial on using PHP3 and MySQL to develop database enabled applications for websites.
Encryption and Decryption using PHP and GnuPG (Zend) - The purpose of this article is to show you how to encrypt and decrypt information with GnuPG using PHP. Most of the major Linux distributions will install GnuPG upon request. Otherwise you can get it by going to http://www.gnupg.org.
Error Handling: Stepping beyond True/False Results (Zend) - This article teaches you to handle errors in an elegant manner, and looks at how to handle PHP script errors as well as passing around your own errors with the PEAR module: PEAR_Error.
Getting Intimate With PHP's Mail() Function - PHP's Mail() function is a great way to send mail using a simple and standard interface that hides the complexity and quirks of various system programs that are responsible for sending mail. This tutorial will introduce you to the basics of sending mail from PHP scripts.
Gimpster - Introductory tutorial geared towards those with little to no PHP experience.
An Introduction to Classes (Zend) - The tutorial guides you through the construction of a simple, security-related class that performs some basic security functions for a web site: checking user logons.
PHP/MySQL Tutorial - The lessons provided in this PHP/MySQL tutorial are short and simple. You'll learn to create and manipulate a simple database of names and birthdates.
PRCE: Perl Compatible Regular Expression In PHP - Article on perl compatible regular expressions. Describes the basics as well as PCRE's special features such as ungreedy matching, lookaheads or the evaluation modifier.
Static Free Energy (Zend) - This tutorial will show you how to produce static html pages using PHP. This is important if you want the benefits of using PHP to build sections of a site where the content of the pages doesn't change very often.
Ten Security Checks for PHP (ONLamp) - Though it's easy to create sites in PHP, it's not immune to sloppy coding. Clancy Malcolm explains how to recognize and fix potential security holes.
DevCentral - Provides tutorials for designing PHP scripts. Requires free registration to view articles.
DevShed.com - A wide range of tutorials and articles with a growing PHP section.
Dotvoid.com - Tutorials, news and discussions regarding web site architecture and building techniques related to PHP.
FCG PHP Tutorial Center - Providing tutorials to beginners and intermediate developers. These tutorials are set for copy and paste. Also quick references and resources.
Free PHP Tutorials - Contains an introduction to the language and free tutorials and scripts.
JustPhukit.com - A resource of PHP tutorials and articles for programmers and developers.
LinuxGuruz - Features tutorials and tips about installing PHP on Linux. Also includes several quick tips for performing very specific tasks.
mtWeb PHP Articles - Tutorials on PHP, PEAR, PHP with MySQL and PHP on Apache. Downloadable code is available. Visitors can comment on articles.
PHP Manual Listing - The manual explains and documents everything about PHP. Listed are the various formats, such as PDF, HTML and Palm. The manual is also available in about 12 different languages.
Official PHP Faq - A list of Frequently Asked Questions about PHP and their answers.
Oracle/PHP FAQ - Describes how PHP interacts with the Oracle Database.
PHP Coding Standard - With permission based on Todd Hoff's C++ Coding Standard. Rewritten for PHP by Fredrik Kristiansen.
PHP Curiosities - Collection of problems/curiosities/bugs/strange things in PHP with many examples and workarounds.
PHP Faq from alt.php - The home of the newsgroup alt.php, contains frequently asked questions and answers from that newsgroup.
PHP Forum at Tek-Tips - PHP technical support forums and mutual help system for computer professionals. Selling and recruiting forbidden.
PHP Function Table - Handy PHP function reference which helps to quickly locate a desired function, to learn which PHP version it available in, and if it is documented. Also provides some statistical reports regarding usage of PHP functions.
PHP Knowledge Base - A repository of PHP related frequently asked questions. A growing collection in a searchable question and answer format.
phpinfo Outputs Repository - An information platform for cross-platform development featuring categorized phpinfo result outputs. A valuable source of information when creating cross-platform scripts.
Computerworld PHP QuickStudy - Article by Sharon Machlis in ComputerWorld. Explainer on the PHP scripting language and what IT managers should know about it. Includes an interview with PHP creator Rasmus Lerdorf and links to other Web resources. (February 4, 2002)