What is the best open source document control app for PHP/MySQL?

Odak kullanımı kolay ve uygulamak için hızlı, sağlam bir sistem üzerinde olmaktır. Dosyaları kamu veya özel olabilir, böylece güvenlik katmanları olması gerekir. Grup varlıkları güzel olurdu. Onlar, ölçeklenebilir sağlam ama overcomplicated olmasaydı proje yönetim özellikleri bir bonus olacaktır.

EDIT #1: Just to formalize this question a little more, I would like to ensure you all understand what I mean by Document Control program. We have a lot of files that are associated with multiple projects and multiple customers. I would like document access and document revisions to be managed. When someone is putting a document into the system, the system needs to tag the file and manage its safe data storage. This will also be a collaborative venture in that many people will download and edit each file. Admins would have to be able to control which file is the CURRENT version of the file, so that we have the choice of hiding older documents or preventing users from accessing them.