# redis应用
- 消息队列,左进右出,用于定时发送短信,微信模板消息,最近新闻,最新新闻
```
<pre class="calibre14">```
$r <span class="token">=</span> <span class="token5">new</span> <span class="token1">Redis</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span>
$r<span class="token">-</span><span class="token">></span><span class="token1">connect</span><span class="token2">(</span><span class="token4">"127.0.0.1"</span><span class="token2">,</span> <span class="token3">6379</span><span class="token2">)</span><span class="token2">;</span>
$r<span class="token">-</span><span class="token">></span><span class="token1">lpush</span><span class="token2">(</span><span class="token4">"msg"</span><span class="token2">,</span><span class="token4">"入队"</span><span class="token2">)</span><span class="token2">;</span>
$res <span class="token">=</span> $r<span class="token">-</span><span class="token">></span><span class="token1">brpop</span><span class="token2">(</span><span class="token4">"msg"</span><span class="token2">,</span><span class="token3">0</span><span class="token2">)</span><span class="token2">;</span><span class="token6">//出队 返回数组 $res[1] 才是值 与rpop直接返回值不同</span>
```
```
- 集合,标签,爱好,共同好友
- 有序集合,排行榜,过滤器刷选
- 字符串,阅读量,计数,点赞,顶踩,session共享,限制每分钟
```
<pre class="calibre14">```
$times <span class="token">=</span> <span class="token1">mktime</span><span class="token2">(</span><span class="token3">23</span><span class="token2">,</span><span class="token3">59</span><span class="token2">,</span><span class="token3">59</span><span class="token2">)</span> <span class="token">-</span> <span class="token1">mktime</span><span class="token2">(</span><span class="token1">date</span><span class="token2">(</span><span class="token4">'H'</span><span class="token2">)</span><span class="token2">,</span><span class="token1">date</span><span class="token2">(</span><span class="token4">'i'</span><span class="token2">)</span><span class="token2">,</span><span class="token1">date</span><span class="token2">(</span><span class="token4">'s'</span><span class="token2">)</span><span class="token2">)</span><span class="token2">;</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">incr</span><span class="token2">(</span><span class="token4">"today"</span><span class="token2">)</span><span class="token2">;</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">expire</span><span class="token2">(</span><span class="token4">'today'</span><span class="token2">,</span>$times<span class="token2">)</span><span class="token2">;</span><span class="token3">0</span>点自动删除<span class="token2">,</span>统计当天用户数
```
```
```
<pre class="calibre14">```
<span class="token6">//手机验证码</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">setex</span><span class="token2">(</span><span class="token4">'15689889565'</span><span class="token2">,</span> <span class="token3">60</span><span class="token2">,</span> <span class="token3">3455</span><span class="token2">)</span><span class="token2">;</span> <span class="token6">//验证码60秒过期</span>
<span class="token6">//计数器</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">incr</span><span class="token2">(</span>$key<span class="token2">)</span><span class="token2">;</span> <span class="token6">//自增</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">incrby</span><span class="token2">(</span>$key<span class="token2">,</span> $increase_num<span class="token2">)</span><span class="token2">;</span> <span class="token6">//按量增加</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">hincrby</span><span class="token2">(</span><span class="token4">'article:id'</span><span class="token2">,</span> <span class="token4">'click'</span><span class="token2">,</span> <span class="token3">1</span><span class="token2">)</span><span class="token2">;</span> <span class="token6">//点赞增加</span>
```
```
- 哈希,缓存用户信息
```
<pre class="calibre14">```
$id<span class="token">=</span><span class="token3">1</span><span class="token2">;</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">hmset</span><span class="token2">(</span>‘user_’<span class="token2">.</span>$id<span class="token2">,</span><span class="token2">[</span><span class="token4">'name'</span><span class="token">=</span><span class="token">></span><span class="token4">'xxxxx'</span><span class="token2">,</span> <span class="token4">'sex'</span><span class="token">=</span><span class="token">></span><span class="token3">1</span><span class="token2">,</span> <span class="token4">'addr'</span><span class="token">=</span><span class="token">></span><span class="token4">'xxxxxxxxxf'</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span>
$user <span class="token">=</span> $redis<span class="token">-</span><span class="token">></span><span class="token1">hgetall</span><span class="token2">(</span><span class="token4">'user_'</span><span class="token2">.</span>$id<span class="token2">)</span><span class="token2">;</span>
```
```
- 延时队列,处理订单一小时后关闭,七天未评价,提醒
```
<pre class="calibre14">```
$redis<span class="token">-</span><span class="token">></span><span class="token1">zAdd</span><span class="token2">(</span><span class="token4">"sms"</span><span class="token2">,</span><span class="token1">time</span><span class="token2">(</span><span class="token2">)</span><span class="token">+</span><span class="token3">3600</span><span class="token2">,</span> <span class="token4">"消息数据"</span><span class="token2">)</span><span class="token2">;</span>入队
<span class="token5">while</span><span class="token2">(</span><span class="token3">true</span><span class="token2">)</span> <span class="token2">{</span>
$msg <span class="token">=</span> $redis<span class="token">-</span><span class="token">></span><span class="token1">zRangeByScore</span><span class="token2">(</span><span class="token4">'sms'</span><span class="token2">,</span> <span class="token3">0</span><span class="token2">,</span> <span class="token1">time</span><span class="token2">(</span><span class="token2">)</span><span class="token2">,</span> <span class="token2">[</span><span class="token4">'limit'</span> <span class="token">=</span><span class="token">></span> <span class="token2">[</span><span class="token3">0</span><span class="token2">,</span> <span class="token3">1</span><span class="token2">]</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span><span class="token6">//出队</span>
<span class="token5">if</span> <span class="token2">(</span>$msg<span class="token2">)</span> <span class="token2">{</span>
$msg<span class="token">=</span> $redis<span class="token">-</span><span class="token">></span><span class="token1">zrem</span><span class="token2">(</span><span class="token4">'sms'</span><span class="token2">,</span>$msg<span class="token2">[</span><span class="token3">0</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span><span class="token6">//移除一个元素</span>
<span class="token6">//具体业务</span>
<span class="token2">}</span> <span class="token5">else</span> <span class="token2">{</span>
<span class="token1">exit</span><span class="token2">(</span><span class="token4">"操作完成"</span><span class="token2">)</span><span class="token2">;</span>
<span class="token2">}</span>
<span class="token1">sleep</span><span class="token2">(</span><span class="token3">1</span><span class="token2">)</span><span class="token2">;</span>
<span class="token2">}</span>
```
```
- 最新评论,最新新闻,存储为list
```
<pre class="calibre14">```
lpush <span class="token5">new</span><span class="token2">.</span>say <span class="token3">1</span> 写入id
ltrim <span class="token5">new</span><span class="token2">.</span>say <span class="token3">0</span> <span class="token3">9</span> 截取为最新<span class="token3">10</span>条前两条同时执行<span class="token2">;</span>
lrange <span class="token5">new</span><span class="token2">.</span>say <span class="token3">0</span> <span class="token3">9</span> 取出这<span class="token3">10</span>个值
如果取出的元素数量不够<span class="token3">10</span>个<span class="token2">,</span>再从数据库查询
```
```
- 排名zset
```
<pre class="calibre14">```
zadd gamepop <span class="token3">10</span> userid1 写入游戏分数<span class="token2">,</span>每次写入
zrevrange gamepop <span class="token3">0</span> <span class="token3">3</span> 获取前四名排名分数从大到小 的id
zrevrank gamepop userid4 显示所有位置中的排名 返回数字<span class="token">+</span><span class="token3">1</span>就是排名
```
```
- 统计用户 统计页面UV 统计IP
```
<pre class="calibre14">```
setbit online <span class="token3">1</span> <span class="token3">1</span> 设置用户<span class="token3">1</span>上线记录<span class="token3">1</span><span class="token2">,</span>第一个<span class="token3">1</span>是用户id<span class="token2">,</span>必须是数字
getbit online <span class="token3">1</span> 判断值是否<span class="token">=</span><span class="token3">1</span><span class="token2">,</span>是的话就在线
bitcount online 统计有多少个<span class="token3">1</span><span class="token2">,</span>就是在线用户
bitop or <span class="token3">7</span>days1 online1 online2 计算<span class="token3">2</span>天在线用户总数
bitop and <span class="token3">7</span>days2 online1 online2 计算两天都在线用户数
另一种方法 HyperLogLog
pfadd onlines user1 记录上线
pfcount onlines 计算用户数量
pfmerge <span class="token3">7</span>day online1 online2<span class="token2">;</span>
pfcount <span class="token3">7</span>day 计算两天内总人数
```
```
- 集群中共享
```
<pre class="calibre16">```
<span class="token1">ini_set</span><span class="token2">(</span><span class="token4">"session.save_handler"</span><span class="token2">,</span> <span class="token4">"redis"</span><span class="token2">)</span><span class="token2">;</span>
<span class="token1">ini_set</span><span class="token2">(</span><span class="token4">"session.save_path"</span><span class="token2">,</span> <span class="token4">"tcp://127.0.0.1:6379"</span><span class="token2">)</span><span class="token2">;</span>
<span class="token1">session_start</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span>
$_SESSION<span class="token2">[</span><span class="token4">'qq'</span><span class="token2">]</span><span class="token">=</span><span class="token3">123</span><span class="token2">;</span>
$redis <span class="token">=</span> <span class="token5">new</span> <span class="token1">Redis</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span>
$redis<span class="token">-</span><span class="token">></span><span class="token1">connect</span><span class="token2">(</span><span class="token4">'127.0.0.1'</span><span class="token2">,</span> <span class="token3">6379</span><span class="token2">)</span><span class="token2">;</span>
echo $redis<span class="token">-</span><span class="token">></span><span class="token1">get</span><span class="token2">(</span> <span class="token4">'PHPREDIS_SESSION:'</span><span class="token2">.</span><span class="token1">session_id</span><span class="token2">(</span><span class="token2">)</span> <span class="token2">)</span><span class="token2">;</span>
```
```
- 简介
- 第一章 数据库
- Mysql/mariadb
- 函数
- 基础
- 增删改索引
- 标准查询
- 高级查询
- TIDB集群mysql解决方案
- Redis
- 语言基础
- 5种数据类型
- 其他类型
- Sqlite
- 语言基础
- 常用查询
- 第二章 PHP
- 语言基础
- 第一课 流程控制和运算
- 第二课 数组
- 第三课 日期时间
- 第四课 常用函数
- 第五课 字符串
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- 第七课 面向对象
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- 第九课 图片处理生成
- 第十课 curl/memche
- 第十一课 mysql和pdo
- 第十三课 cookie和session
- 第十四课 xml操作
- 第十五课 php5.3+新特性
- 第十六课 php7+
- 第十七课 密码安全
- 废弃函数
- php命令行
- redis应用
- 算法
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- 无限级分类
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- laravel
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- dingo/api
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- thinkphp6
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- PHP相关工具
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- markdown语言
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- go语言框架Gin
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- git
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- crontab定时任务
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