I decided to play with PHP 8.0 on my site, just to see if it worked.
Predictably, it bricked my site immediately. I thought it was going to be an incompatible plugin, but going to the Wordpress logs, it was a memory limit error. I was able to correct in my php.ini
When I made that change however, I noticed that the default values for PHP 7.4 and PHP 8 were pretty different.
These PHP INI settings being adjusted is something that should have already been done as part of pushing out PHP 8 to all servers, but that doesn’t seem to have been the case here. I’ve run an ansible command to push out the default settings to all servers that don’t have them already, so the settings should now be updated.
You can also use the MultiPHP INI Editor to edit the server-level PHP INI as well.