PHP怎么批量添加地区数据

下面这个是栏目添加，怎么把它改为批量添加

public function add()
{
$city_list = M("DealCity")->where('is_delete = 0')->findAll();
$city_list = D("DealCity")->toFormatTree($city_list,'name');
$this->assign("city_list",$city_list);

$this->assign("new_sort", M("Area")->max("sort")+1);
$this->display();
}