Note: This manual is provided for your convenience only - this is not the official source and may not be 100% up to date.
PEAR, the PHP Extension and Application Repository (originally, PHP Extension and Add-on Repository) is PHP's version of foundation classes, and may grow in the future to be one of the key ways to distribute PHP extensions among developers.
PEAR was born in discussions held in the PHP Developers' Meeting (PDM) held in January 2000 in Tel Aviv. It was created by Stig S. Bakken, and is dedicated to his first-born daughter, Malin Bakken.
Since early 2000, PEAR has grown to be a big, significant project with a large number of developers working on implementing common, reusable functionality for the benefit of the entire PHP community. PEAR today includes a wide variety of infrastructure foundation classes for database access, content caching, mathematical calculations, eCommerce and much more.
More information about PEAR can be found in the manual.
The PHP Quality Assurance Initiative was set up in the summer of 2000 in response to criticism that PHP releases were not being tested well enough for production environments. The team now consists of a core group of developers with a good understanding of the PHP code base. These developers spend a lot of their time localizing and fixing bugs within PHP. In addition there are many other team members who test and provide feedback on these fixes using a wide variety of platforms.
PHP-GTK is the PHP solution for writing client side GUI applications. Andrei Zmievski remembers the planing and creation process of PHP-GTK: