PHP-GTK's docs should be moved to the PhD rendering system, but it is a fairly large job.
Would involve
migrating the current documentation to a docbook 5 format
writing a PhD compatible theme to generate documentation
writing a reflection based updater to keep docs up to date with code (parsing signals, methods, properties and updating the xml)
getting autogeneration set up so
PHP-GTK docs are generated on a regular basis
Working on a fork of docgen.php to pick up classes, methods and signals
Got appropriate markup for the signals stuff
Still need a theme, and no doubt other stuff