SabreDAV allows you to easily add WebDAV support to a PHP application. SabreDAV is meant to cover the entire standard, and attempts to allow integration using an easy to understand API.

• Fully WebDAV compliant
• Supports Windows XP, Windows Vista, Mac OS/X, DavFSv2, Cadaver, Netdrive, Open Office, and probably more.
• Passing all Litmus tests.
• Supporting class 1, 2 and 3 Webdav servers.
• Locking support.
• Custom property support.
• CalDAV (tested with Evolution, iCal, iPhone and Lightning).
• CardDAV (tested with OS/X addressbook, the iOS addressbook and Evolution).
• Over 97% unittest code coverage.

• RFC2617: Basic/Digest auth.
• RFC2518: First WebDAV spec.
• RFC3744: ACL (some features missing).
• RFC4709: DavMount.
• RFC4791: CalDAV.
• RFC4918: WebDAV revision.
• RFC5397: current-user-principal.
• RFC5689: Extended MKCOL.
• RFC5789: PATCH method for HTTP.
• RFC6352: CardDAV
• draft-daboo-carddav-directory-gateway: CardDAV directory gateway
• CalDAV ctag, CalDAV-proxy.