phpEasyVCS
File based version control system written in PHP
phpEasyVCS is a simple version control system (VCS) with minimal hosting requirements, namely PHP 5.2+. No database is needed.
Files can be viewed and uploaded with a browser or by WebDAV, which allows you to access the files like a local drive in all operating systems. For integration with other software a REST service is provided.
It is very easy to view the file versions at a specific point in time. The web interface allows you to easily compare file versions and synchronize and merge local files with the files in phpEasyVCS.
It is possible to host multiple repositories and define multiple users with full, read-only or no access to each of the repositories.