How to get value of email form JWT - php

Question

Im usign dialogflow to create a booking table assistant.
To get info by user, he need to sign in with google so when finish the conversation i would take uderId value of user.
For take that I use jose-php library so:
header( 'Access-Control-Allow-Headers: *' );
header( 'Access-Control-Allow-Origin: *' );
header( "Access-Control-Allow-Credentials: true" );
header( 'Content-Type: application/json' );
include('../phpseclib/Net/SSH2.php');
include('../JOSE/JWT.php');
include('../JOSE/URLSafeBase64.php');
$jwt_string = 'userIdtoken';
$jwt = JOSE_JWT::decode($jwt_string);
echo $jwt['JOSE_JWT']['Claims']['email'];
the problem is that I recive error printing email value!
How I could get it?
$jwt value result so:
JOSE_JWT Object
(
[header] => Array
(
[alg] => RS256
[kid] => cf022a49e9786148ad0e379cc854844e36c3edc1
[typ] => JWT
)
[claims] => Array
(
[iss] => https://accounts.google.com
[nbf] => 1551435957967
[aud] => 284549458086-fdoluk70pqkcuh8vj4tj1dou15v444tiua.apps.googleusercontent.com
[sub] => 1092379345381822971290339
[email] => dasdasddas#gmail.com
[email_verified] => 1
[name] => frank rossi
[picture] => https://lh4.googleusercontent.com/-79eVyjn_YU8/AAAAAAAAAAI/AAAAAAAAPBs/uvq_fruLiB0/s96-c/photo.jpg
[given_name] => Federico
[family_name] => Idsfdsfdsf
[iat] => 1545351958267
[exp] => 155143534961867
[jti] => 428254345532cddf49dec17d24ace2e6f45f8af4b14b2
)
[signature] => 'somthing'
[raw] => 'somthing'
)

Answer 1

It seems to me like the problem is a typo. You wrote $jwt['JOSE_JWT']['Claims']['email'];, but the key is claims, not Claims.
Also, $jwt seems to be an object of class JOSE_JWT, not an array. So using it with subscript operator is not possible just like that. You should instead access its properties:
$jwt->claims['email']