yii实现使用CUploadedFile上传文件的方法_PHP

<form action="<&#63;php echo $this->createUrl('/upload/default/upload/');&#63;>" method="post" enctype="multipart/form-data">
<input type="file" name="file"/>
<input type="hidden" name="dir" value="<&#63;php echo Yii::app()->controller->currentDir&#63;>"/>
<input type="submit" value="Upload Image"/>
</form>

public function actionUpload()
{
$this->currentDir = isset($_REQUEST['dir']) ? $_REQUEST['dir'] : '';
$image = CUploadedFile::getInstanceByName('file');
$name = $this->uploadPath.'/'.$this->currentDir.'/'.$image->name;
$image->saveAs($name);
$this->redirect(array('index','dir'=>$this->currentDir));
}