Class Firebase\JWT\JWT not found

Question

I want to use pure firebase/php-jwt library in my code. Firstly, I go to /var/www/html/ and like the official library page is suggesting, I do this

Answer 1

I added only one line to your code to get my code to work:

require __DIR__ . '\vendor\autoload.php';
use Firebase\JWT\JWT;

/* the rest of your code after this */

I did not have to modify the jwt.php file at all.