PHP8: Update for deprecated null parameters

Another absolute bitch thing PHP8 has done is deprecate support for null function arguments that expect strings.

So, simple things like trim($param) will fail if $param is null. Are you fucking kidding me!? But casting the null to a string still works so instead of PHP8 doing that automatically for me, I now have to go and find every fucking instance where this is a problem and either null check the parameter, or cast it to (string).

WHAT A FUCKING CUNT.