Facebook’s HipHop for PHP can provide massive performance benefits, but it may not be feasible to use in your environment. However, it can be configured to provide static analysis of your code base, uncovering bugs and problems before they happen in production. This talk will provide an overview of HpHp’s benefits and limitations and how static analysis works. Also covered will be how to integrate it with your build system, the type of bugs you’ll find (and how to fix them), and learn about it’s quirks. Once you have it running, you’ll never see a “undefined variable” notice again (among with many others)!