《PHP實例:詳解thinkphp+redis+隊列的實現代碼》要點:
本文介紹了PHP實例:詳解thinkphp+redis+隊列的實現代碼,希望對您有用。如果有疑問,可以聯系我們。
相關主題:thinkphp教程
1,安裝Redis,根據自己的PHP版本安裝對應的redis擴展(此步驟簡單的描述一下)PHP學習
1.1,安裝 php_igbinary.dll,php_redis.dll擴展此處需要注意你的php版本如圖:PHP學習
PHP學習
1.2,php.ini文件新增 extension=php_igbinary.dll;extension=php_redis.dll兩處擴展PHP學習
ok此處已經完成第一步redis環境搭建完成看看phpinfoPHP學習
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項目中實際使用redisPHP學習
2.1,第一步配置redis參數如下,redis安裝的默認端口為6379: PHP學習
<?php /* 數據庫配置 */ return array( 'DATA_CACHE_PREFIX' => 'Redis_',//緩存前綴 'DATA_CACHE_TYPE'=>'Redis',//默認動態緩存為Redis 'DATA_CACHE_TIMEOUT' => false, 'REDIS_RW_SEPARATE' => true, //Redis讀寫分離 true 開啟 'REDIS_HOST'=>'127.0.0.1', //redis服務器ip,多臺用逗號隔開;讀寫分離開啟時,第一臺負責寫,其它[隨機]負責讀; 'REDIS_PORT'=>'6379',//端口號 'REDIS_TIMEOUT'=>'300',//超時時間 'REDIS_PERSISTENT'=>false,//是否長連接 false=短連接 'REDIS_AUTH'=>'',//AUTH認證密碼 ); ?>
2.2,實際函數中使用redis:
PHP學習
/** * redis連接 * @access private * @return resource * @author bieanju */ private function connectRedis(){ $redis=new \Redis(); $redis->connect(C("REDIS_HOST"),C("REDIS_PORT")); return $redis; }
2.3,秒殺的核心問題是在大并發的情況下不會超出庫存的購買,這個就是處理的關鍵所以思路是第一步在秒殺類的先做一些基礎的數據生成:PHP學習
//現在初始化里面定義后邊要使用的redis參數 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";//當前商品隊列的用戶情況 $this->goods_number_key = "goods".$goods_id;//當前商品的庫存隊列 } $this->user_id = $this->user_id ? $this->user_id : $_SESSION['uid']; }
2.4,第二步就是關鍵所在,用戶在進入商品詳情頁前先將當前商品的庫存進行隊列存入redis如下:
PHP學習
/** * 訪問產品前先將當前產品庫存隊列 * @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 && $this->error("當前秒殺已結束!"); if($goods['goods_num'] > $goods['order_num']){ $redis = $this->connectRedis(); $getUserRedis = $redis->hGetAll("{$this->user_queue_key}"); $gnRedis = $redis->llen("{$this->goods_number_key}"); /* 如果沒有會員進來隊列庫存 */ 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("系統繁忙,請稍后搶購!"); } }else{ $this->error("當前產品已經秒殺完!"); } }
接下來要做的就是用ajax來異步的處理用戶點擊購買按鈕進行符合條件的數據進入購買的排隊隊列(如果當前用戶沒在當前產品用戶的隊列就進入排隊并且pop一個庫存隊列,如果在就拋出,):
PHP學習
/** * 搶購商品前處理當前會員是否進入隊列 * @access public * @author bieanju */ public function goods_number_queue(){ !$this->user_id && $this->ajaxReturn(array("status" => "-1","msg" => "請先登錄")); $model = M("flash_sale"); $where['goods_id'] = $this->goods_id; $goods_info = $model->where($where)->find(); !$goods_info && $this->error("對不起當前商品不存在或已下架!"); /* redis 隊列 */ $redis = $this->connectRedis(); /* 進入隊列 */ $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($goods_number_key){ // 判斷用戶是否已在隊列 if (!$redis->hGet("{$this->user_queue_key}", $this->user_id)) { // 插入搶購用戶信息 $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" => "系統繁忙,請重試!")); } }
附加一個調試的函數,刪除指定隊列值:PHP學習
public function clearRedis(){ set_time_limit(0); $redis = $this->connectRedis(); //$Rd = $redis->del("{$this->user_queue_key}"); $Rd = $redis->hDel("goods49",'用戶id''); $a = $redis->hGet("goods_49_user", '用戶id'); if(!$a){ dump($a); } if($Rd == 0){ exit("Redis隊列已釋放!"); } }
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持腳本之家.
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