Doxygen does not document my non-class functions in PHP?

I'm using Doxygen (Doxywizard the GUI) to document a PHP project. Doxygen is not documenting my non-class files.

i.e. In some files, I havenot created any class, the file just contains some f开发者_Python百科unctions. Doxygen is not documenting the functions. Any help?

Here goes the config file Doxywizard generated for me

Did you put a comment block containing a @file command in the file?

See also http://www.doxygen.org/docblocks.html#structuralcommands
(the paragraph that starts with "Let's repeat that, because it is often overlooked")