PHP Reflect is a library that adds the ability to reverse-engineer classes, interfaces, functions, constants, namespaces and more.
The first mature Release Candidate (RC2) of API 2.0 was released Tue, 18 Feb 2014. It was distributed as source code (install via composer) and a PHAR version that bundles all dependencies in a single file.
Follow development on the official Blog.
Have a look on master branch for previous stable API 1.0