While the examples below are written using PHP the concepts apply to any language so all developers should find them useful. If you'd like to build your own JWT generator or just learn a little bit more about them the following guide will help. The library also offers more advanced usage and functionality if you'd like to read the documentation. It's perfect if you need to quickly implement user authentication on a simple API. Use ReallySimpleJWT \ Token // Generate a token $token = Token :: getToken ( ' userIdentifier ', ' secret ', ' tokenExpiryDateTimeString ', ' issuerIdentifier ' ) // Validate the token $result = Token :: validate ( $token, ' secret ' ) Signature: This secures the token and is a hash of the encoded header and payload, along with a secret.Payload: This contains any information you wish to transfer about the user, eg the user identifier.Header: This contains information on the token type, usually JWT, and the hashing algorithm used, eg HMAC SHA256 or RSA.The core benefits of JSON Web Tokens are twofold: you don't need to use sessions or cookies to maintain authentication between states and you don't have to constantly call the database for user information as this can be stored in the token payload.Įach token is broken down into three parts and each part is separated by a dot. And they allow you to easily transfer information via an encoded JSON payload. The code is accessible via GitHub and Packagist.įor those of you who have not used JSON Web Tokens before they are a URL friendly, token based, authentication system. I have spent the last year intermittently working on a PHP JSON Web Token library called ReallySimpleJWT, and this week I released version 1.0.0.
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