Generating JWT tokens in php
A JWT token mainly consists of Header, payload, signature
<?php
function generate_jwt($headers, $payload, $secret = 'secret') {
$headers_encoded = base64url_encode(json_encode($headers));
$payload_encoded = base64url_encode(json_encode($payload));
$signature = hash_hmac('SHA256', "$headers_encoded.$payload_encoded", $secret, true);
$signature_encoded = base64url_encode($signature);
$jwt = "$headers_encoded.$payload_encoded.$signature_encoded";
return $jwt;
} ?>
In this function where we are generating a JWT token requires to pass headers and payload variables which we are generating as shown below:
$headers = array('alg'=>'HS256','typ'=>'JWT');
$payload = array('sub'=>'1234567890','name'=>'John Doe', 'admin'=>true, 'exp'=>(time() + 60));
$jwt = generate_jwt($headers, $payload);
Thus we can generate a JWT token in php