[Mediawiki-l] Upgrade 1.9.3 -> 1.12.0 fails

[Tim Starling]

Gsandtner Michael wrote:
> We successfully run mediawiki for a year with version 1.9.3 
> (with an extension function defining these hooks: 
> AutoAuthenticate, SpecialPage_initList, UserLogoutComplete).
> 
> Now we tried to upgrade to 1.12.0. The upgrade process seemed 
> to be OK, since the installer completed with "Installation 
> successfull".
> However, it does not work; the error log states:
> PHP Fatal error:  Class 'DOMDocument' not found in 
> /magwien/var/gondor-phpserver/html/m13wiki/includes/Preprocess
> or_DOM.php on line 566

This is a bug in MediaWiki, and could easily be fixed by backporting 
r34283 and releasing 1.12.1.

-- Tim Starling