Thread:Project:Support desk/PHP and Mysql was upgraded on my server and now I get a blank white page./reply

You did not tell us your MediaWiki version number. ;-) You always could do an update of MediaWiki, but right now I wouldn't. I would advice you to not change even more things (which might break even more stuff). Instead you should try to understand, which problem you have right now. Activate the PHP error log and see what it tells you after you tried to visit some pages in your wiki. With this info you can check, what makes sense as the next step.