Free web programming components as PHP class scripts.

phpThumb() uses the GD library to create thumbnails from images (JPEG, PNG, GIF, BMP, etc) on the fly.

ActiveState's PHP Cookbook is a collaborative collection of techniques from the PHP community.

Full featured email transfer class for PHP.

phppdflib is a class written in php that presents an easy to use API for generating PDF files dynamically.

Classes for creating Excel documents with PHP.

PHP Input Filter is a class that allows developers to easily filter input.

Allows reading, writing and display of JPEG metadata formats.

PHPCodeAnalyzer is a small class to look at a php script and tell you what functions etc its using.

AMFPHP is an open-source Flash Remoting gateway. AMF is a very lightweight binary format that is a lot faster than XML. Remoting is the way to go if you're looking to build robust, fast and secure RIAs.

Vogoo is a free PHP LIB you can use to easily add collaborative filtering features (personalization) to your website.

Freetag is an easy tagging and folksonomy-enabled plugin for use with MySQL-PHP applications. It allows you to create tags on existing database schemas, and access and manage your tags through a robust API.

Swift is a fully OOP library for sending e-mails from PHP websites and applications. It does not rely on PHP's native mail() function; instead, Swift communicates directly with an SMTP server or a MTA binary to send mail quickly and efficiently.

A simple, portable PHP class with full TrackBack capabilites.

A set of PHP classes and library functions to help facilitate building, debugging, and rendering of XML, HTML, XHTML, WAP/WML Documents, and SVG images as well as complex HTML widgets.

Simple class that makes it easy, with a couple lines of code, to get a sortable list (or sortable just about anything) onto a page and to translate the result into a PHP array.

SabreAMF is an AMF client and server for PHP5.

phpFlickr is a class written by Dan Coulter in PHP4 to act as a wrapper for Flickr's API. Methods process the response XML and return a friendly array of data to make development simple and intuitive.

Beautify PHP is a PEAR package that tries to reformat and beautify PHP source code files automatically. Included is a web frontend.

A library of common PHP functions.

TinyButStrong is a library that enables you to create HTML pages dynamically. It's a Template Engine for the PHP language. It enables you to easily display information from your database, but also to seriously harmonize and simplify your PHP programming.

A library of high quality PHP classes for the creation of dynamic websites and contentmanagement applications.

Class that generates valid RSS 1.0, RSS 2.0 and ATOM 1.0 feeds.

BunnyRegex is a class wrapper around the preg_* functions of PHP that makes working with regular expressions less like fumbling with ancient Norse runes and more like actual programming.

Rrom the makers of the SPAW WYSIWYG editor comes Solmetra Maps, a class that allows you to display Google Maps in your application.

Monte Ohrt's PHP resources which he has either written or contributed to.