To make a very long story short, I dislike MySQL greatly, and I'm in a situation where I can't install another engine.
That got me thinking, is there a database engine in pure PHP? As in, no dependencies other than a writable filesystem and PHP itself? I only need the most basic of features, like searching for rows and being able to add/remove entries from anywhere in the database. It would be awesome if I could avoid MySQL for this simple project!