命名空间问题。 使用来自错误对象的方法

Question

I'm having an issue with my code below. The error I get is:

Catchable fatal error: Argument 1 passed to Closure::QuizApp\Routes{closure}() must be an instance of QuizApp\Routes\ServerRequestInterface, instance of Slim\Http\Request given in /var/www/QuizApp/Routes/AuthRoutes.php on line 8

Is this because I'm declaring a namespace at the top? I can solve it by using an alias, but I'm curious as to why it's happening in the first place.

<?php

namespace QuizApp\Routes;

use \Psr\Http\Message\ServiceRequestInterface;
use \Psr\Http\Message\ResponseInterface;

$app->get('/login', function(ServerRequestInterface $req, ResponseInterface $resp) use ($config) {

    $callback = $config['site']['domain'] . $this->router->pathFor('fb_callback');
    return $this->FBAuthServices->redirect_to_auth_page($config['facebook']['permission'],
                                                        $callback);

});

Edit After looking at my own code, I realize I don't even need the namespace. The class that was in this file, has now been moved out. Would still love an answer though, I'm curious.

Answer 1

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must be an instance of QuizApp\Routes\ServerRequestInterface

use \Psr\Http\Message\ServiceRequestInterface;

It's a typo, it should be named ServerRequestInterface in the use.