WebDAV [1] stands for \”Web-based Distributed Authoring and Versioning\”. It is a set of extensions to the HTTP protocol which allows users to collaboratively edit and manage files on remote web servers.
There are client [2][3] and server [4] implementations in PHP.
[1] http://webdav.org
[2] http://www.azzit.de/phpwebdav
[3] http://lwest.free.fr/doc/php/lib
[4] http://bitflux.ch/developer
