PHP

Create JWT Using HS256, HS384, or HS512

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using HS256, HS384, or HS512. (HS256 is JWT's acronym for HMAC-SHA256.) When HMAC is used, the secret is a shared secret (i.e. password) that both client and server know beforehand.

This example also demonstrates how to include time constraints:

• nbf: Not Before Time
• exp: Expiration Time
• iat: Issue At Time

Chilkat2 PHP

<?php

use Chilkat2\JsonObject;
use Chilkat2\Jwt;

// Demonstrates how to create an HMAC JWT using a shared secret (password).

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$jwt = new Jwt();

// Build the JOSE header
$jose = new JsonObject();
// Use HS256.  Pass the string "HS384" or "HS512" to use a different algorithm.
$jose->AppendString('alg', 'HS256');
$jose->AppendString('typ', 'JWT');

// Now build the JWT claims (also known as the payload)
$claims = new JsonObject();
$claims->AppendString('iss', 'http://example.org');
$claims->AppendString('sub', 'John');
$claims->AppendString('aud', 'http://example.com');

// Set the timestamp of when the JWT was created to now.
$curDateTime = $jwt->GenNumericDate(0);
$claims->AddIntAt(-1, 'iat', $curDateTime);

// Set the "not process before" timestamp to now.
$claims->AddIntAt(-1, 'nbf', $curDateTime);

// Set the timestamp defining an expiration time (end time) for the token
// to be now + 1 hour (3600 seconds)
$claims->AddIntAt(-1, 'exp', $curDateTime + 3600);

// Produce the smallest possible JWT:
$jwt->AutoCompact = true;

$strJwt = $jwt->CreateJwt($jose->Emit(), $claims->Emit(), 'secret');

echo $strJwt, "\n";