composer require firebase/php-jwt:^2.2

字符串
安装正常
所以呢

use \Firebase\JWT\JWT;
    $key = "example_key";
    $payload = array(
        "iss" => "http://example.org",
        "aud" => "http://example.com",
        "iat" => 1356999524,
        "nbf" => 1357000000
    );
    $jwt = JWT::encode($payload, $key);

型
错误类型

未找到类'Firebase\Jwt\Jwt'

救救我！
详细信息错误
Dettaglio Errore
谢谢您的支持