Advice on handling Apache prepending REDIRECT_ to OIDC claim variables

[EvanShaw]

With the release of 2.4.0 and after, REDIRECT_ is now sometimes prepended to server variables, at least in PHP's $_SERVER global, which means that claim variables don't always have the same name. I found some useful info in this stackoverflow thread about the REDIRECT_ phenomenon, but it still is incredibly confusing and hard to reason about.

Relevant section in 2.4.0 release notes:

those who use claim environment variables will find that the names of these variables are now prefixed with REDIRECT_

While this behavior is unwanted and seems insane to me, it doesn't look like there is any way to disable it.

So, I have two questions for anyone who has dealt with this:

1. Can the prepending of REDIRECT_ be recursive? So, for example, if I go to a page with multiple redirects caused by rewrite rules in multiple .htaccess files, is it possible that variable names end up like this: REDIRECT_REDIRECT_...?
2. What's the best way around this? I'm leaning towards creating a dedicated function in PHP to handle accessing claim variables

Any help is greatly appreciated