case 1:   
        // 文件大小超出了服务器的空间大小   
        $this->setError("The file is too large (server).");   
break;   

case 2:   
        // 要上传的文件大小超出浏览器限制   
        $this->setError("The file is too large (form).");   
        break;   

    case 3:   
        // 文件仅部分被上传   
        $this->setError("The file was only partially uploaded.");   
        break;   

    case 4:   
        // 没有找到要上传的文件   
        $this->setError("No file was uploaded.");   
        break;   

    case 5:   
        // 服务器临时文件夹丢失   
        $this->setError("The servers temporary folder is missing.");   
        break;   

    case 6:   
        // 文件写入到临时文件夹出错   
        $this->setError("Failed to write to the temporary folder.");   
        break;   
}