Thinkphp批量添加数据

//新建规格
public function construction(){
    $id = $_GET['id'];//dump($id);die;
    $this->assign('id', $id);
    if(IS_POST){
        $admin_id = $_POST['admin_id'];
        $sta_name = $_POST['sta_name'];

        $data['isValid'] = '1';
        $data['createTime'] = date("Y-m-d H:i:s");
        $data['name'] = $sta_name;
        $data['adminUserId'] = $admin_id;

        $sta = M('re_goodsstandard')->add($data);
        if(!empty($sta)){
            $name = $_POST['name'];
            $child = explode(',', $name);
            if(is_array($child)){
                foreach($child as $v){
                    $arr[] = array(
                        'isValid' => '1',
                        'createTime' =>date("Y-m-d H:i:s"),
                        'name' => $v,
                        'parentStandardId' => $sta,
                        'adminUserId' => $admin_id
                    );

                }
                if($arr)
                {
                    $childer = M('re_goodsstandard')->addAll($arr);
                    //$this->redirect('norms', array('id' => $admin_id));
                    $this->ajaxReturn($admin_id);

                }

            }
        }
    }

    $this->display();
}