The readme says that db connection happens before forking. Im assuming its MySql. This means every child inherits the same tcp connection to the db. That single connection is not only shared, but also will timeout out shortly after startup (depending on the environment of course) Im guessing this is an error in the readme because that sounds a like a major issue.

This project looks really promising. It's not something I'd deploy in production today, but I'd love for a pure PHP application server to become a mature and production-ready. Could be a great option for the future. I'll definitely be watching its progress.