SabreDAV is the most popular WebDAV framework for PHP. Use it to create WebDAV, CalDAV and CardDAV servers.

Full documentation can be found on the website:

http://sabre.io/

branch	status
master
2.1
2.0
1.8
1.7
1.6
xml-rewrite2

SabreDAV is being developed by fruux. Drop us a line for commercial services or enterprise support.