php 中的秒杀

 控制器层
  //秒杀 首先要判断库存  其次高并发  然后入库
     public function goods_do()
     {
         $gid=input("get.gid");
         $user_name=Session::get("user_name");
         $obj = new Goods();
         $ku_num=$obj->getNum($gid);
         if($ku_num<1)
         {//库存不够
             return 1;
         }

         /*$redis=new \Redis();
         $redis->connect('127.0.0.1','6379');
         $redis->lPush("spick",$user_name);*/

         $data['user_name']=$user_name;
         $data['g_id']=$gid;
         $data['add_time']=time();
         $data['payment']=0;
         $paymentObj = new Payment();
         $id=$paymentObj->add_payment($data);
         Session::set('id',$id);
         if($id)
         {
             return 1;
 //            $this->success("秒杀成功，正在跳转支付页面",'payment_show');
         }
     }