ZF2上传文件不能正常工作

Question

我需要你的帮助。我尝试使用Zend Framework 2创建表单上传，并按照here的说明，返回allways echo "failed";并且文件不想切换到预定位置。

这是我的代码：

$nonFile = $request->getPost()->toArray();
$File    = $this->params()->fromFiles('fileupload');
$data    = array_merge_recursive(
    $this->getRequest()->getPost()->toArray(),           
    $this->getRequest()->getFiles()->toArray()
);
if(!empty($data['fileupload']['name'])){                
    $size = new Size(array('min'=>2000000));
    $adapter = new \Zend\File\Transfer\Adapter\Http(); 
    $adapter->setValidators(array($size), $File['name']);
    if($adapter->isValid()){
        $adapter->setDestination('./helpdesk');
        if ($adapter->receive($File['name'])) {
            echo "success ";
        }else{
            echo "failed";
        }
    }else{
        echo "no upload file";
    }
}

任何人都可以帮助我吗？我的代码有问题吗？