phpModeler is a Reverse Engineering (RE) tool that statically analyses web application source code (php scripts, html pages, and JavaScript libraries)
and generates models based on the Connalen's Web UML extensions that can be used as a basis for architecture recovery and that facilitate maintenance of legacy web applications.

phpModeler is an Eclipse plugin.

Figure: Example model generated by the phpModeler and displayed using Eclipse UML2 tools

More information is available in the following pdf