These are the different implementations I had a look at for use with DokuWiki. I finally decided on SabreDav.

• http://pear.php.net/package/HTTP_WebDAV_Server
• Intro: http://talks.php.net/show/webdav/
• single file
• quite old. last update 2006

• http://www.sitepoint.com/article/build-intranet-ez-publish/
• http://ez.no/doc/ez_publish/technical_manual/3_8/features/webdav
• looks quite complex, removing the ez dependencies might be difficult
• probably well tested in real life usage

• http://code.google.com/p/sabredav/
• new and active developed codebase (last checkin 18.12.08)
• Litmus full pass
• Handles temporary files like .DS_Store .thumbs
• PHP5 only
• multiple files and directories
• DokuWiki example