jsp操作文件，删除文件代码

jsp操作文件，删除文件代码
 function delete($filenames,$action)

 {

  if($filenames)

  {

   if(is_array($filenames))

   {

    foreach($filenames as $filename)

    {

     if(fileext($filename)=='sql')

     {

      @unlink(PHPCMS_ROOT.'/data/bakup/'.$filename);

     }

    }

    showmessage('操作成功！'.$filename, '?file='.$this->file.'&action='.$action);

   }

   else

   {

    if(fileext($filenames)=='sql')

    {

     @unlink(PHPCMS_ROOT.'/data/bakup/'.$filenames);

     showmessage('操作成功！'.$filenames, '?mod='.$this->mod.'&file='.$this->file.'&action='.$action);

    }

   }

  }

  else

   showmessage('select_delete_bak_file');

 }