Facebook PHP SDK - getUser() suddenly returns 0

Question

First of all, to get this out of the way, I\'ve spent hours looking through answers to this question here on StackOverflow, and tried to solve it on my own, but it just isn\

Answer 1

I had this issue, which turned out to be a corrupt certificate. I think I had autocrlf turned on in Git. I don't know if that fixed it or not, but blowing away my whole repo and re-cloning from source caused this problem to clear right up!