Server upgrade broken website and calendars

Hi
Sorry if this is an easy and obvious question. I've just upgraded from 10.7 to 10.9 server, and I'm struggling to get my Wordpress website back up and running, and the Calendar service. Mail seems to be working.
I know that the upgrade moved my web files around - I've found the location of the Wordpress install, as well as the database, but just restoring them to their previous locations doesn't seem to work.
As for the calendar service, I haven't a clue what's happened.
Perhaps naively, I just assumed that the Apple upgrade route would be painfree and simple. I have a full backup, but I'm hoping not to have to downgrade just yet - although it might be simpler to downgrade to the working version, export everything, then reimport with the upgraded version.
Thanks
Jeremy

Just stumbled on your question....
In 10.7 were you using MySQL as your WordPress db? If so 10.9 no longer uses MySQL. My sugestion is to "reinstall" a more current version of MySQL, then re-import your schema and data. Also be mindful of the PHP. Apple uses older version of PHP in their OS to control other services. Not sure which ones but Calendar might be affected in part.
Had simular problems with Concrete5 CMS. Had to format and reinstall several times before I got it all working.

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