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1，安裝Redis，根據(jù)自己的PHP版本安裝對應(yīng)的redis擴(kuò)展（此步驟簡單的描述一下）

1.1，安裝 php_igbinary.dll，php_redis.dll擴(kuò)展此處需要注意你的php版本如圖：

1.2，php.ini文件新增 extension=php_igbinary.dll;extension=php_redis.dll兩處擴(kuò)展

ok此處已經(jīng)完成第一步redis環(huán)境搭建完成看看phpinfo

項(xiàng)目中實(shí)際使用redis

2.1，第一步配置redis參數(shù)如下，redis安裝的默認(rèn)端口為6379：　

<?php
/* 數(shù)據(jù)庫配置 */
return array(
 'DATA_CACHE_PREFIX' => 'Redis_',//緩存前綴
 'DATA_CACHE_TYPE'=>'Redis',//默認(rèn)動(dòng)態(tài)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(wù)器ip，多臺用逗號隔開；讀寫分離開啟時(shí)，第一臺負(fù)責(zé)寫，其它[隨機(jī)]負(fù)責(zé)讀；
 'REDIS_PORT'=>'6379',//端口號
 'REDIS_TIMEOUT'=>'300',//超時(shí)時(shí)間
 'REDIS_PERSISTENT'=>false,//是否長連接 false=短連接
 'REDIS_AUTH'=>'',//AUTH認(rèn)證密碼 
);
?>

2.2，實(shí)際函數(shù)中使用redis：

/**
  * 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(fā)的情況下不會超出庫存的購買，這個(gè)就是處理的關(guān)鍵所以思路是第一步在秒殺類的先做一些基礎(chǔ)的數(shù)據(jù)生成：

//現(xiàn)在初始化里面定義后邊要使用的redis參數(shù)
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(dāng)前商品隊(duì)列的用戶情況
   $this->goods_number_key = "goods".$goods_id;//當(dāng)前商品的庫存隊(duì)列
  }
  $this->user_id = $this->user_id ? $this->user_id : $_SESSION['uid'];  
 }

2.4,第二步就是關(guān)鍵所在，用戶在進(jìn)入商品詳情頁前先將當(dāng)前商品的庫存進(jìn)行隊(duì)列存入redis如下：

 /**
 * 訪問產(chǎn)品前先將當(dāng)前產(chǎn)品庫存隊(duì)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 && $this->error("當(dāng)前秒殺已結(jié)束！");
  if($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(jìn)來隊(duì)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(tǒng)繁忙，請稍后搶購！");
   }
  }else{
   $this->error("當(dāng)前產(chǎn)品已經(jīng)秒殺完！");
  }
   
 }

接下來要做的就是用ajax來異步的處理用戶點(diǎn)擊購買按鈕進(jìn)行符合條件的數(shù)據(jù)進(jìn)入購買的排隊(duì)隊(duì)列（如果當(dāng)前用戶沒在當(dāng)前產(chǎn)品用戶的隊(duì)列就進(jìn)入排隊(duì)并且pop一個(gè)庫存隊(duì)列，如果在就拋出，）：

/**
  * 搶購商品前處理當(dāng)前會員是否進(jìn)入隊(duì)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(dāng)前商品不存在或已下架！"); 
  /* redis 隊(duì)列 */ 
  $redis = $this->connectRedis();
  /* 進(jìn)入隊(duì)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($goods_number_key){
   // 判斷用戶是否已在隊(duì)列
   if (!$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(tǒng)繁忙,請重試！"));
  }
 }

附加一個(gè)調(diào)試的函數(shù)，刪除指定隊(duì)列值：

 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(duì)列已釋放！");   
   }
  }

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持綠夏網(wǎng)。