PHP: Hypertext Preprocessor

PHP is a recursive acronym for PHP: Hypertext Preprocessor; it is a server-side scripting language that can be embedded into HTML to create dynamic web content amongst other things. SavageReactor along with millions of other web sites use PHP to build their pages.

You can find out more about what PHP can do on php.net's "What can PHP do?". If you're completely new to PHP and want a beginner's guide, php.net also has a basic tutorial.

Misc

phpBB Link Spam Protection Mod
LSP prevents link spam by checking the URL of new registrations and profile updates. It can also check the domain name of an e-mail address to verify it exists (using DNS). It provides plenty of options which can be configured using the ACP, including e-mail reports of any action taken.

Scripts

Get Image (get_image.php)
A script to stop leechers from stealing bandwidth by linking to your images from their sites.

Mail Form (mail_form.php)
A script to process form data and e-mail it to a specified e-mail address.

phpBB Link Spammer Removal
The script searches through the phpBB user table searching for specific keywords in the "www" field. If a match is found, a number of actions can be performed based on the options.

PHP Ink Finder
This script uses a text-based database to allow users to select their printer by make, model and then shows the user what cartridges they need.