JWT(JSON Web Token) Creation (Without CURL) in CodeIgniter 3

 <?php

defined("BASEPATH") or exit("No direct script access allowed");

use Firebase\JWT\JWT;

use Firebase\JWT\Key;

//Below is JWT Token Creation without CURL

class Token extends CI_Controller

{

    public function __construct()

    {

        parent::__construct();

    }

    public function index()

    {

        $key = 'example_key';

        $payload = [

            'iss' => 'http://heer.org',

            'aud' => 'http://heer.com',

            "email" => "Mahesh@gmail.com",

            'iat' => time()

        ];

        /**

         * IMPORTANT:

         * You must specify supported algorithms for your application. See

         * https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40

         * for a list of spec-compliant algorithms.

         */

        $jwt = JWT::encode($payload, $key, 'HS256');

        print_r($jwt);

        $decoded = JWT::decode($jwt, new Key($key, 'HS256'));

        echo "<pre>";

        print_r($decoded);

    }

}