Facebook and Open Source — David Recordon interview. HipHop really embodies how we create at Facebook. It started as a hackathon project by Haiping Zhao, who was later joined by Iain Proctor and Minghui Yang. Haiping noticed a number of similarities between the syntax of PHP and C++, and wondered if you could programmatically rewrite one into another. Two-and-half years and a few other engineers later, HipHop was serving the vast majority of Facebook’s production traffic. It takes our PHP source code, transforms it into C++, and compiles it into a self-contained binary that we deploy on production web servers.