I see it's time to create an SVN-repository for spfgblib. Together with that I also started a redesign of the whole application to make it more useful and make the sample applications (or modules, if you want) more distinguishable from the library itself.
Since the project has been growing over it's first use as a spamfiltered guestbook application it has been renamed to "spfgblib". It became a generally usable Spamfilter-interface for all types of web-based forms like feedback forms, guestbooks, blogs and many "Web 2.0" applications. The author uses it in 3 such applications by now.
After running and training spfgb for over a year at my private (and rarely visited) website and after blocking any junk for several moths I decided to have a closer look at what the filter is actually working every day. It reached 100 SPAMS after only 40 hours! And I did not notice a single false positive during that time! This is much better than I ever expected! And it explains why guestbooks are considered dead by so many website owners. Nobody wants to kill over 60 SPAMS each day by hand! But with spfgb you do not have to do that anymore.
As a spin off from the spfgb-project I created a package named spfgblib. It contains the PHP-Library which acts as an interface between the bayes-filter and the guestbook. It can be used as a general purpose spam-filtering-library.
Today I releases version 0.3a. It's still alpha because the guestbook itself lacks a couple of important functions. The spamfilter itself has prooven to be a great tool!
The initial release is available for download. The package only includes the PHP-Sourcecode. Database-definitions and instructions on how to set up spamprobe are not included (yet).