使用JWT创建令牌时出错

Question

我正在构建API，但是使用JWT创建令牌时遇到未捕获错误，当我运行邮递员调用时，出现错误日志堆栈跟踪：

#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PHP服务器上检查jwt文件时，它就有类JWT。

带有jwt类屏幕截图的**jwt.php**页面

然后我用来创建令牌的页面是**api.php**

// SECRETE_KEY是用于为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 ，因此您将需要use它：

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

或在调用时使用其完整名称空间：

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

Answer 2

如果从GitHub复制文件而不是使用composer进行安装，则需要在文件顶部注释掉名称空间行。 因此，从jwt.php屏幕截图第一行顶部的快照中，您将//namespace Firebase\\JWT;注释掉//namespace Firebase\\JWT; 并且您不会再收到500内部服务器错误。