This article mainly introduces php+redis to realize the flash sale function of the mall. It has certain reference value. Interested friends can refer to it. I hope it can help everyone.
1. Install redis and install the corresponding redis extension according to your own PHP version (this step is briefly described)
1.1. Install php_igbinary.dll. The php_redis.dll extension needs attention here. Your php version is as shown below:
##1.2.php.ini file adds extension=php_igbinary.dll;extension=php_redis.dll two extensions ok The first step of setting up the redis environment has been completed. Take a look at phpinfo 2. The actual use of redis in the project2.1. The first step is to configure redis The parameters are as follows. The default port for redis installation is 6379:<?php /* 数据库配置 */ return array( 'DATA_CACHE_PREFIX' => 'Redis_',//缓存前缀 'DATA_CACHE_TYPE'=>'Redis',//默认动态缓存为Redis 'DATA_CACHE_TIMEOUT' => false, 'REDIS_RW_SEPARATE' => true, //Redis读写分离 true 开启 'REDIS_HOST'=>'127.0.0.1', //redis服务器ip,多台用逗号隔开;读写分离开启时,第一台负责写,其它[随机]负责读; 'REDIS_PORT'=>'6379',//端口号 'REDIS_TIMEOUT'=>'300',//超时时间 'REDIS_PERSISTENT'=>false,//是否长连接 false=短连接 'REDIS_AUTH'=>'',//AUTH认证密码 ); ?>
/** * redis连接 * @access private * @return resource * @author bieanju */ private function connectRedis(){ $redis=new \Redis(); $redis->connect(C("REDIS_HOST"),C("REDIS_PORT")); return $redis; }
//现在初始化里面定义后边要使用的redis参数 public function _initialize(){ parent::_initialize(); $goods_id = I("goods_id",'0','intval'); if($goods_id){ $this->goods_id = $goods_id; $this->user_queue_key = "goods_".$goods_id."_user";//当前商品队列的用户情况 $this->goods_number_key = "goods".$goods_id;//当前商品的库存队列 } $this->user_id = $this->user_id ? $this->user_id : $_SESSION['uid']; }
/** * 访问产品前先将当前产品库存队列 * @access public * @author bieanju */ public function _before_detail(){ $where['goods_id'] = $this->goods_id; $where['start_time'] = array("lt",time()); $where['end_time'] = array("gt",time()); $goods = M("goods")->where($where)->field('goods_num,start_time,end_time')->find(); !$goods && $this->error("当前秒杀已结束!"); if($goods['goods_num'] > $goods['order_num']){ $redis = $this->connectRedis(); $getUserRedis = $redis->hGetAll("{$this->user_queue_key}"); $gnRedis = $redis->llen("{$this->goods_number_key}"); /* 如果没有会员进来队列库存 */ if(!count($getUserRedis) && !$gnRedis){ for ($i = 0; $i < $goods['goods_num']; $i ++) { $redis->lpush("{$this->goods_number_key}", 1); } } $resetRedis = $redis->llen("{$this->goods_number_key}"); if(!$resetRedis){ $this->error("系统繁忙,请稍后抢购!"); } }else{ $this->error("当前产品已经秒杀完!"); } }
/** * 抢购商品前处理当前会员是否进入队列 * @access public * @author bieanju */ public function goods_number_queue(){ !$this->user_id && $this->ajaxReturn(array("status" => "-1","msg" => "请先登录")); $model = M("flash_sale"); $where['goods_id'] = $this->goods_id; $goods_info = $model->where($where)->find(); !$goods_info && $this->error("对不起当前商品不存在或已下架!"); /* redis 队列 */ $redis = $this->connectRedis(); /* 进入队列 */ $goods_number_key = $redis->llen("{$this->goods_number_key}"); if (!$redis->hGet("{$this->user_queue_key}", $this->user_id)) { $goods_number_key = $redis->lpop("{$this->goods_number_key}"); } if($goods_number_key){ // 判断用户是否已在队列 if (!$redis->hGet("{$this->user_queue_key}", $this->user_id)) { // 插入抢购用户信息 $userinfo = array( "user_id" => $this->user_id, "create_time" => time() ); $redis->hSet("{$this->user_queue_key}", $this->user_id, serialize($userinfo)); $this->ajaxReturn(array("status" => "1")); }else{ $modelCart = M("cart"); $condition['user_id'] = $this->user_id; $condition['goods_id'] = $this->goods_id; $condition['prom_type'] = 1; $cartlist = $modelCart->where($condition)->count(); if($cartlist > 0){ $this->ajaxReturn(array("status" => "2")); }else{ $this->ajaxReturn(array("status" => "1")); } } }else{ $this->ajaxReturn(array("status" => "-1","msg" => "系统繁忙,请重试!")); } }
public function clearRedis(){ set_time_limit(0); $redis = $this->connectRedis(); //$Rd = $redis->del("{$this->user_queue_key}"); $Rd = $redis->hDel("goods49",'用户id''); $a = $redis->hGet("goods_49_user", '用户id'); if(!$a){ dump($a); } if($Rd == 0){ exit("Redis队列已释放!"); } }
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