This was obviously an April Fools' joke, Xdebug will continue to stay Open Source and free of charge. Later today I will be releasing the first Release Candidate of Xdebug 2.1. With regret I have to announce that from this release, I will no longer provide Xdebug as an open source debugger extension. I've noticed that there are other projects making money of Xdebug's success while I only receive d