Firebase REST access using PHP with Authentication

[dan...@fit.net]

I'm trying to access the realtime database with PHP, while using security rules. The only way I've been able to read or modify anything using PHP is setting things globally readable / writable, which obviously isn't optimal.

I've gotten all of these errors, trying different permutations of authentication:

"Permission denied"
"Missing claim 'kid' in auth header."
"Invalid claim 'kid' in auth header."

Full details with code are posted here.

Thanks!