Because my tracking beacon uses the open source tracking framework phpOpenTracker, which is written in PHP.

I was pretty happy with phpOpenTracker, but not overly happy. It doesn’t support PostgreSQL, for one thing. Eventually, I ended up creating a Catalyst + PostgreSQL tracker, which I expect to deploy instead of phpOpenTracker on automaticallyyours.com, after migrating the 20,000+ hits from phpOpenTracker’s database to my system.