Zend Framework2-验证上传文件大小和扩展名，直接在调用函数验证的方法

$request = $this->getRequest();
        if($request->isPost()) { 
     $files =  $request->getFiles()->toArray();
     $httpadapter = new Http(); 
     //限制大小和类型
     $filesize  = new Size(array('max' => 100000 )); //100KB  
     $extension = new Extension(array('extension' => array('doc')));
     $httpadapter->setValidators(array($filesize, $extension), $files['resume']['name']);
     if($httpadapter->isValid()) {
         $httpadapter->setDestination('./data/upload/');
         if($httpadapter->receive($files['resume']['name'])) {
             $newfile = $httpadapter->getFileName(); 
         }
     }
}