如何使用PHP和Zend Framework进行文件上传？

<form action="/upload" method="post" enctype="multipart/form-data">
   <input type="file" name="file" />
   <input type="submit" value="Upload" />
</form>

return [
    'router' => [
        'routes' => [
            'upload' => [
                'type' => 'literal',
                'options' => [
                    'route' => '/upload',
                    'defaults' => [
                        'controller' => Controller\IndexController::class,
                        'action' => 'upload',
                    ],
                ],
            ],
        ],
    ],
];

public function uploadAction()
{
    $request = $this->getRequest();
    if ($request->isPost()) {
        $file = $request->getFiles('file');
        $filename = $file['name'];
        $filetmp = $file['tmp_name'];
        $filesize = $file['size'];
        $filetype = $file['type'];

        // 检查文件类型和大小
        // ...

        // 移动文件到指定目录
        $target_dir = "./data/uploads/";
        $target_file = $target_dir . basename($filename);
        move_uploaded_file($filetmp, $target_file);

        // 显示成功消息
        // ...
    }

    // 返回上传表单
    // ...
}