PHP framework for book sharing

[Rogelio]

Several coworkers and I have scattered amongst us all sorts of resources 
  related to the mesh stuff we do (RADIUS, networking, RF, antennas, 
microwave, R&S, Linux, etc), and most of these resources are in the form 
of PDF or Word docs.

Is there a PHP framework that I can easily "apt-get install" on an 
Ubuntu box that would allow us to login and easily share these resources 
with each other?

(Ideally, something like this would have an RSS feed so that we could 
get updates when a coworker uploads something.)