Class.RC4  

RC4 is fairly fast, secure and symmetric encryption algorithm. Developed by Ron Rivest in 1987 was kept trade secret until 9th September 1994 when it was posted on a Cypherpunks mailing list. Generally the key it uses is limited to 40 bits for various legal reasons but 128bits is the more common forms these days. To prove it's strength products like Oracle Secure SQL are examples. It's symmetric meaning it uses the same key and steps as to encrypt when decrypting.

Price: Free (GPL)

   tagster_lib.php  

Module to transform URL and E-Mail addresses into clickable links.

Hosting Requirements: PHP 4
Price: Free

   EasyForms  

EasyForms is a set of PHP class objects that allow for quick and easy Form creation. Features: Easy Installation and Configuration - Form Object allows you to create HTML forms in minutes - Customizable Client Side Validation - Programmable Form Controls.

Hosting Requirements: PHP 4.2+
Price: Free

   Japha  

Japha is an attempt to bring the main classes in the Java 1.4.1 (soon to be 1.4.2, time allowing) to PHP for use in everyday programs. This allows us to easily implement interface, abstract classes, and more inheritance capabilities, not to mention excellent error handling and the ability to better conform with user-created data types.

Hosting Requirements: PHP 5
Price: Free (LGPL

   Porter Stemming Algorithm  

The Porter Stemming Algorithm was developed by Martin Porter for reducing English words to their word stems. This PHP class is a fairly faithful implementation of the algorithm. The primary use of stemming words is in keyword indexing, if you're building a search application.

Hosting Requirements: Unix/Linux, Windows
Price: Free (GPL)

   CodeKit  

CodeKit is an interface to a master code description lookup table. CodeKit takes all of the programming work out of maintaining multiple database code definition sets. The code administration page lets you define new virtual code tables and enter all codes and their descriptions. Perl and PHP classes retrieve the code descriptions and automatically generate HTML code selection elements.

Hosting Requirements: Unix/LInux, Windows; PHP
Database: SQL
Price: Free (LGPL

   stop words function  

stop words function This simple php script is a function that takes a list of stop words (commnly occuring words that are of no use to a search engine) and strips them out of a variable term. This is similar to google removal of common words.

Price: Free (GPL)

   PHP highlighter  

This PHP function lets you easily highlight e.g. search results on a specific website. Just pass the words to highlight, the path of the page (server path) and the color to highlight with. The extraordinary property about this function is that it manages not to perform replacements inside HTML tags (which could also include the word to highlight.

Hosting Requirements: PHP
Price: Free (GPL)

   PHP Report class  

The PHP Report classes are used to create html report pages from a generic result set array. A result set is any array you can came up with. That usually means the result of a sql query, and normally it is not ready for display.

Hosting Requirements: Linux
Price: Free (GPL)