PSA
I updated this simple RSS file from Davis and got it working again. But, I was quickly told it’s not a good idea to use this. I see that no one in this thread mentioned this yet, I’m not sure why. Because so many people seemed to like this I assumed it would work fine.
So that no one else (who isn’t a developer) spends hours trying to get something like this working, I thought I’d post this warning. (And, I’m sure this goes for any other vanilla type php code snippets out there that pull from Flarum's API.)
According to @rob006:
Every request to feed will generate 21 (!) internal requests to API, so usage of these feeds will consume a lot of resources and potentially may freeze your forum if you have a limit for concurrent PHP processes (and any sane configuration will have such a limit). And because there is no proper encoding for feed content, it is easy to break feed by adding a post with ]] in it. And if you add cache, it will become vulnerable to cache poisoning.
