Slim 应用程序错误：Respect\Validation\Validator

尝试验证我的 OrderForm.php 时出现此错误。如果有人关注了Codecourse 购物车教程，您可能知道我为什么会收到此错误。这是我的一些文件中的代码，我认为与此错误最相关，当然还有错误。

错误：

消息：未找到“Respect\Validation\Validator”类
文件：PATH/cart/app/Validation/Forms/OrderForm.php on 13

我还将发布我的目录文件夹的这张图片：目录文件夹图片

订单表格.php

<?php

namespace Cart\Validation\Forms;


use Respect\Validation\Validator as v;

class OrderForm
{
    public static function rules()
    {
        return [
            'email' => v::email(),
            'name' => v::alpha(' '),
            'address1' => v::alnum(' -'),
            'address2' => v::optional(v::alnum(' -')),
            'city' => v::alnum(' '),
            'postal_code' => v::alnum(' '),
        ];
    }
}

验证器.php

<?php

namespace Cart\Validation;

use Cart\Validation\Contracts\ValidatorInterface;
use Psr\Http\Message\ServerRequestInterface as Request;
use Respect\Validation\Exceptions\NestedValidationException;

class Validator implements ValidatorInterface
{
    protected $errors = [];

    public function validate(Request $request, array $rules)
    {
        foreach ($rules as $field => $rule) {
            try {
                $rule->setName(ucfirst($field))->assert($request->getParam($field));
            } catch (NestedValidationException $e) {
                $this->errors[$field] = $e->getMessages();
            }
        }

        $_SESSION['errors'] = $this->errors;

        return $this;
    }

    public function fails()
    {
        return !empty($this->errors);
    }
}

验证器接口.php

<?php

namespace Cart\Validation\Contracts;

use Psr\Http\Message\ServerRequestInterface as Request;

interface ValidatorInterface
{
    public function validate(Request $request, array $rules);
    public function fails();

}

编辑：我只想说，我改变：
use Respect\Validation\Validator as v;
以
use Cart\Validation\Validator as v;

然后我得到一个全新的错误，这样就可以了。