About the Akismet API and the Services_Akismet2 package.
The Akismet API is a web-service API used to filter spam from user-submitted comments. The Akismet API allows for both detecting and marking spam comments. When used correctly, the Akismet API can tremendously reduce the amount of work required to maintain user-submitted comments on a website. Often, the use of the Akismet API can reduce or eliminate the need for other spam-filtering solutions.
Services_Akismet2 is an object-oriented implementation of the Akismet API. Services_Akismet2 supports all features of the Akismet API and provides and easy-to-use PHP 5 interface.
Services_Akismet2 is derived from the miPHP Akismet class written by Bret Kuhns for use in PHP 4. Services_Akismet2 requires PHP 5.2.1 or greater.