使用JWT创建令牌时出错

Question

我正在构建一个API，但是在使用JWT创建我的令牌时出现Uncaught错误，当我运行一个post man调用时，我进入我的错误日志堆栈跟踪：

#0 [internal function]: Api->generateToken()
#1 /home/osconliz/public_html/Osconlizapicall/rest.php(42): ReflectionMethod->invoke(Object(Api))
#2 /home/osconliz/public_html/Osconlizapicall/index.php(4): Rest->processApi()
#3 {main}
thrown in /home/osconliz/public_html/Osconlizapicall/api.php on line 36
[19-May-2018 02:04:47 UTC] PHP Fatal error:  Uncaught Error: Class 'JWT' not found in /home/osconliz/public_html/Osconlizapicall/api.php:36
Stack trace:
#0 [internal function]: Api->generateToken()
#1 /home/osconliz/public_html/Osconlizapicall/rest.php(42): ReflectionMethod->invoke(Object(Api))
#2 /home/osconliz/public_html/Osconlizapicall/index.php(4): Rest->processApi()
#3 {main}

但是当我在我的PHP服务器上检查我的jwt文件时，它上面有JWT类。

带有jwt类屏幕截图的

**jwt.php**页面

然后我用来创建**api.php**

标记的页面

// SECRETE_KEY是为JWT创建传递的常量

   <?php 
  class Api extends Rest {
    public $dbConn;  

     public function __construct(){
        parent::__construct();  
        $db = new DbConnect;
        $this->dbConn = $db->connect();

    }

    public function generateToken(){
        $client_id_key = $this->validateParameter('client_id_key', $this->param['client_id_key'], STRING);
        //$client_secret_key = $this->validateParameter('client_secret_key', $this->param['client_secret_key'], STRING);
        //client_secret_key should be commented out it is not used for validation for security purposes, only id key

        $stmt = $this->dbConn->prepare("SELECT * FROM `api_clients_properties` WHERE client_id = :client_id_key");
        $stmt->bindParam(":client_id_key", $client_id_key);
        $stmt->execute();
        $user = $stmt->fetch(PDO::FETCH_ASSOC);
        if (!is_array($user)){
            $this->returnResponse(API_NAME_REQUIRED, "Invalid Client Id Key");
        }

        if ($user['property_status'] == "not verified"){
           $this->returnResponse(API_NAME_REQUIRED, "Property not verified, please contact admin, to verify it");   
        }

        $payload = [
           'iat' => time(),
           'iss' => 'localhost',
           'exp' => time() + (60),
           'userId' => $user['id']
        ];
        $token = JWT::encode($payload, SECRETE_KEY);
        echo $token;
    }

  }

?>

Answer 1

JWT类位于命名空间Firebase\JWT中，因此您需要use它：

use \Firebase\Jwt\Jwt;
Jwt::encode(...);

或者在调用时使用其完整命名空间：

\Firebase\Jwt\Jwt::encode();

Answer 2

如果您从GitHub复制文件而不是使用composer来安装它，则需要注释掉文件顶部的命名空间行。所以，从jwt.php屏幕截图第一行最顶部的快照中，您将注释掉//namespace Firebase\JWT;，并且您不会再次收到500内部服务器错误。