PHP-JWT

A simple library to encode and decode JSON Web Tokens (JWT) in PHP, conforming to RFC 7519.

Installation

Use composer to manage your dependencies and download PHP-JWT:

composer require firebase/php-jwt

Example

<?php
use \Firebase\JWT\JWT;

$key = "example_key";
$token = array(
    "iss" => "http://example.org",
    "aud" => "http://example.com",
    "iat" => 1356999524,
    "nbf" => 1357000000
);

/**
 * 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.
 */
$jwt = JWT::encode($token, $key);
$decoded = JWT::decode($jwt, $key, array('HS256'));

print_r($decoded);

/*
 NOTE: This will now be an object instead of an associative array. To get
 an associative array, you will need to cast it as such:
*/

$decoded_array = (array) $decoded;

/**
 * You can add a leeway to account for when there is a clock skew times between
 * the signing and verifying servers. It is recommended that this leeway should
 * not be bigger than a few minutes.
 *
 * Source: http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html#nbfDef
 */
JWT::$leeway = 60; // $leeway in seconds
$decoded = JWT::decode($jwt, $key, array('HS256'));

?>

Changelog

3.0.0 / 2015-07-22

• Minimum PHP version updated from 5.2.0 to 5.3.0.
• Add \Firebase\JWT namespace. See #59 for details. Thanks to @Dashron!
• Require a non-empty key to decode and verify a JWT. See #60 for details. Thanks to @sjones608!
• Cleaner documentation blocks in the code. See #62 for details. Thanks to @johanderuijter!

2.2.0 / 2015-06-22

• Add support for adding custom, optional JWT headers to JWT::encode(). See #53 for details. Thanks to @mcocaro!

2.1.0 / 2015-05-20

• Add support for adding a leeway to JWT:decode() that accounts for clock skew between signing and verifying entities. Thanks to @lcabral!
• Add support for passing an object implementing the ArrayAccess interface for $keys argument in JWT::decode(). Thanks to @aztech-dev!

2.0.0 / 2015-04-01

• Note: It is strongly recommended that you update to > v2.0.0 to address known security vulnerabilities in prior versions when both symmetric and asymmetric keys are used together.
• Update signature for JWT::decode(...) to require an array of supported algorithms to use when verifying token signatures.

Tests

Run the tests using phpunit:

$ pear install PHPUnit
$ phpunit --configuration phpunit.xml.dist
PHPUnit 3.7.10 by Sebastian Bergmann.
.....
Time: 0 seconds, Memory: 2.50Mb
OK (5 tests, 5 assertions)

License

3-Clause BSD.