Thread:Project:Support desk/Cannot connect database server/reply (3)

The error message, which you get, definitely is not output by MediaWiki. It seems to be output by the server or so: Sorry! This site is experiencing technical difficulties.

Try waiting a few minutes and reloading.

(Cannot contact the database server) Is it possible that together with the PHP upgrade the host also changed something with the MySQL server? E.g. that they changed the server and it now is available under a different IP address? That would be relevant for the value of $wgDBserver. Please also double check the MySQL username and password, which you have provided in LocalSettings.php. A mistake there can also cause this problem.