Thread:Project:Support desk/How to upgrade the media wiki

Dear All, Am using older version of media wiki, and mySql as the database.The url is http://onlineconstitution.net As whole server has been upgraded to new PHP version am getting such error. I need a way to how to fix the error without losing my file and data.

It could be great help if i could get help on this as soon as possible.

Thanks and regards