Zend Framework 업로드 파일 이름 바꾸기

//实例化文件上专类
$fName=$this->_request->getPost('fName');
$adapter = new Zend_File_Transfer_Adapter_Http();
//存放上传文件的文件夹
$adapter->setDestination('/opt/lampp/htdocs/blog/upload');
//上传配置
$adapter
->addValidator ( 'Extension', false, $configs['extension'])//文件格式限制
->addValidator('Size', false, array('min' =>floatval($configs['minsize']),
	'max' => floatval($configs['maxsize'])))//设置上传文件的大小在1-2M之间
->addValidator ( 'Count', false, array('min' => intval($configs['mincount']),
	'max' => intval($configs['maxcount'])) );//上传文件数量
//重命名配置
$fileInfo = $adapter->getFileInfo();//获取基本配置
$extName=$this->getExtension($fileInfo);//获取扩展名
$filename=md5(time() $fileInfo['fFile']['name']).'.'.$extName;//重命名
$adapter->addFilter('Rename', array('target' => $filename, 'overwrite' => true));//执行重命名

//返回上传后出现在信息
if (!$adapter->receive())
{
	$messages = $adapter->getMessages ();//检测
	//Zend_Debug::dump($messages);
	$message='';
	if(is_array($messages))
	{
		foreach($messages as $k=>$v)
		{
			$message.=$k.':'.$v.'';
		}
	}
	else
	{
		$message=$messages;
	}
}
else
{
	$this->view->message='上传成功！';
}

/**
 * 获取文件扩展名
 * @param String $name 	文件名词
 * @author
 */
public function getExtension ($name)
{
	$fname='';
	if($name)
	{
		foreach ($name as $val)
		{
			$fname=$val['name'];
		}
		$exts = @split("[/\.]", $fname) ;
		$n = count($exts)-1;
		$exts = $exts[$n];
		return $exts;
	}
}