PHP versioning software?

[Anon]

Here's a question I was sent:

• Do you know of any versioning software
  for PHP, where large groups of writers
  can submit documentation to the site,
  and old versions are stored somewhere
  similar to CVS?

Honestly, I haven't a clue if there is any. I'd asssume it wouldn't be too difficult to write however: give each documentation topic was given a number, and each version was given a number - similar to a threaded discussion forum with parentID and ChildID and such.

So, is this the way to approach it? Or has someone already dealt with this before?

[Anon]

And why not use CVS? It's exaclty what they need...I think they are just looking for a web interface for it.

[Anon]

I'm not clear on what you're looking for. If this is a code-versioning system, then something like CVS is appropriate -- and there are Web front-ends available. If it's versioning for content management, then you should look at CMS products such as egrail and Midgard (both PHP-based), Mason (Perl) and Zope (Python). Zope is probably the most robust in terms of content version control and rollback, but it's also the most weird.