From Cerauno Technologies:
DocGuru is a professional PHP documentation tool for Windows platform. It is small, simple and extremely fast. DocGuru is developed keeping in mind all the basic features that will be required to create a brief documentation. DocGuru creates fully cross linked documentation for PHP projects. DocGuru uses information about source code symbols and existing comments in source code files (any source files that support comments) and external documentation files and creates accurate documentation for all PHP projects. It even recognises and works with doxygen input file making migration a piece of cake.