Redis 学习笔记5 常用php函数

Redis 学习笔记五 常用php函数

PHPRedis的安装在这里：

http://blog.csdn.net/xundh/article/details/46288277

键值操作

<code class=" hljs lasso"><span class="hljs-variable">$redis</span> <span class="hljs-subst">=</span> <span class="hljs-literal">new</span> Redis();<span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>connect(<span class="hljs-string">'127.0.0.1'</span>, <span class="hljs-number">6379</span>);<span class="hljs-comment">//参数：connect(host,port,timeout)</span><span class="hljs-comment">//timeout可以为空，在redis.conf里timeout默认300</span><span class="hljs-comment">//pconnect不会主动关闭的连接</span></code>

key

<code class=" hljs lasso"><span class="hljs-comment">//写入值</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span><span class="hljs-built_in">set</span>(<span class="hljs-variable">$work</span><span class="hljs-subst">-></span>uid, <span class="hljs-variable">$workString</span>);<span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>setnx(<span class="hljs-variable">$work</span><span class="hljs-subst">-></span>uid,<span class="hljs-variable">$workString</span>); <span class="hljs-comment">//key不存在是赋值</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>setex(<span class="hljs-variable">$a</span>,<span class="hljs-number">50</span>,<span class="hljs-number">1</span>);                <span class="hljs-comment">//range设置值后ttl设为50</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>setrange(key,offset,value);<span class="hljs-comment">//获取值</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>get(<span class="hljs-variable">$work</span><span class="hljs-subst">-></span>uid);<span class="hljs-comment">//删除key</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>del(<span class="hljs-variable">$work</span><span class="hljs-subst">-></span>uid);var_dump(<span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>get(<span class="hljs-variable">$work</span><span class="hljs-subst">-></span>uid));  <span class="hljs-comment">//返回bool(false)</span><span class="hljs-comment">//键是否存在</span><span class="hljs-keyword">if</span>(<span class="hljs-subst">!</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>exists(<span class="hljs-string">'key'</span>))   var_dump(<span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>del(<span class="hljs-string">'key'</span>));       <span class="hljs-comment">//返回int(0)</span></code>

mset多个key操作

<code class=" hljs php"><span class="hljs-comment">//设置mset</span><span class="hljs-variable">$array_mset</span>=[<span class="hljs-string">'a'</span>=><span class="hljs-number">1</span>,<span class="hljs-string">'b'</span>=><span class="hljs-number">2</span>];<span class="hljs-variable">$redis</span>->mset(<span class="hljs-variable">$array</span>);<span class="hljs-variable">$redis</span>->msetnx(<span class="hljs-variable">$array</span>);    <span class="hljs-comment">//key不存在时才写入，但一次要么全写，要么全不写。</span><span class="hljs-comment">//读取mset</span><span class="hljs-variable">$array_mget</span>=[<span class="hljs-string">'a'</span>,<span class="hljs-string">'b'</span>];<span class="hljs-variable">$redis</span>->mget(<span class="hljs-variable">$arram_mget</span>);<span class="hljs-comment">//删除多个key</span><span class="hljs-variable">$redis</span>->del(<span class="hljs-variable">$array_mget</span>);</code>

keys

<code class=" hljs php"><span class="hljs-comment">//读取keys</span><span class="hljs-variable">$array_mset_keys</span>=[<span class="hljs-string">'abc'</span>=><span class="hljs-number">1</span>,<span class="hljs-string">'bcd'</span>=><span class="hljs-number">2</span>,<span class="hljs-string">'cde'</span>=><span class="hljs-number">3</span>];<span class="hljs-variable">$redis</span>->keys(<span class="hljs-string">'*a*'</span>);  <span class="hljs-comment">//返回['a'=>1];</span><span class="hljs-variable">$redis</span>->keys(<span class="hljs-string">'b??'</span>);  <span class="hljs-comment">//返回['b'=>2];</span><span class="hljs-variable">$redis</span>->keys(<span class="hljs-string">'*'</span>);    <span class="hljs-comment">//返回所有keys</span></code>

getset key value

设置值并返回旧值

strlen

返回字符串长度

getrange(substr)

字符串截取

rename

键改名

<code class=" hljs ruby"><span class="hljs-variable">$redis</span>->rename(<span class="hljs-string">'a'</span>,<span class="hljs-string">'a1'</span>);    <span class="hljs-regexp">//</span>成功返回<span class="hljs-keyword">true</span>，键不存在时返回<span class="hljs-keyword">false</span>，newkey已经存在其值会被覆盖；</code>

renamex

键改名，newkey存在时不改

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>renamex(<span class="hljs-string">'a'</span>,<span class="hljs-string">'a1'</span>); <span class="hljs-comment">//a1如果已经存在，返回0；</span></code>

append

字符串追加

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>append(<span class="hljs-string">'a'</span>,<span class="hljs-string">'12345'</span>) ;<span class="hljs-comment">//如果a不存在，就是普通的set操作</span></code>

incr

储存的数字值增1

incrby

值增increment

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>incrby(<span class="hljs-string">'a'</span>,<span class="hljs-number">10</span>);</code>

decr

数字值减1

decrby

数字值减decrement

setbit key offset value

设置或清除指定位

getbit key offset

获取指定偏移量上的位

type

返回key值类型
返回值有以下几种：

none	(key不存在)	int(0)
string	字符串	int(1)
list	列表	int(3)
set	集合	int(2)
zset	有序集合	int(4)
hash	哈希表	int(5)

randomkey

随机返回一个key

<code class=" hljs bash"><span class="hljs-built_in">echo</span> <span class="hljs-variable">$redis</span>->randomkey();   //如果没有key 返回<span class="hljs-literal">false</span></code>

object

查看对象

move

移动数据

<code class=" hljs ruby"><span class="hljs-variable">$redis</span>-><span class="hljs-constant">MOVE</span>(<span class="hljs-string">'a'</span>,<span class="hljs-number">1</span>));   <span class="hljs-regexp">//</span>把键a从当前数据库移到<span class="hljs-number">1</span>里。如果key不存在，返回<span class="hljs-keyword">false</span>; 目标数据库存在key时，返回<span class="hljs-keyword">false</span>.</code>

Hash

hset key field value

设置哈希值

hsetnx key field value

不存在时设置值

hmset key field value[field value…]

设置多个哈希值

hget key field

获取hash域值

hmget key field [field …]

获取若干个域值

hgetall key

返回key所有域和值

hdel key field [field…]

删除一个或多个域

hlen key

返回key里域数量

hexists key field

查看key里给定域的field是否存在

hincrby key field increment

域值增加increment

hkeys key

返回所有域

hvals key

返回key所有值

表

lpush key value[value…] 表头插入一个或多个值

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>lpush(<span class="hljs-string">'a'</span>,<span class="hljs-number">1</span>);<span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>lpush(<span class="hljs-string">'a'</span>,<span class="hljs-number">2</span>);</code>

lpushx key value

当且仅当key存在并且是一个列表时才插入

rpush key value

表尾插入

rpushx key value

lpop key

移除并返回key头元素

rpop key

移除并返回key的尾元素

blpop key [key…]

timeout lpop的阻塞版本，如果没有可供弹出的元素，程序会等待。

brpop key [key…]

timeout rpop的阻塞版本

llen key

返回列表 key的长度

lrange key start stop

返回区间

lrem key count value

移除列表值为value的元素
count>0 从表头向表尾搜索，移除值为value的元素，数量为count
countcount=0 移除值为value的元素

lset key index value

设置key下标为index的值

ltrim key start stop

对列表修剪，删除区间外元素

lindex key index

返回下标为index的元素

linsert key

插入

rpoplpush source destination

弹出最后一个元素，把元素插入到列表destination里作为表头

brpoplpush source destination timeout

阻塞

集合(Set)

sadd key member [member …]

插入元素到集合里

srem key member [member …]

移除元素

smembers key

返回集合成员

sismember key member

判断member是否是key的成员

scard key

返回集合key的基数

smove source destination member

member元素从source移动到destination

spop key

移除并返回集合中的一个随机元素

srandmember

返回集合中一个随机元素

sinter key [key…]

返回集合成员

sinterstore destination key[key…]

返回成员到destination里，如果目标存在则覆盖

sunion key [key …]

返回集合全部成员

sunionstore destination key[key…]

返回成员保存到destination

sdiff key[key…]

返回一个集合的全部成员

sdiffstore destination key[key…]

结果保存到destination

Sorted Set有序集

zadd key score member[[score member] [score member] …]

一个或多个member及其score加入到有序集key中

zrem key member [member…]

移除有序集key中的一个或多个成员

zcard key

返回有序集key的基数

zcount key min max

返回有序集key中，score值在min与max之间的成员

zscore key member

返回有序集key中成员member的score值

zincreby key increment member

给member成员的score值增量

zrange key start stop [WITHSCORES]

返回有序集key中指定区间成员，score从小到大

zrevrange key start stop [WITHSCORES]

返回key中指定区间内的成员，score从大到小

zrangebyscore

返回区间成员，score从小到大

zrevrangebyscore key max min [WITHSCORES] [LIMIT offset count]

返回敬意成员，score从大到小

zrank key member

返回member排名，score从小到大

zrevrank key member

member排名，score递减

ZREMRANGEBYRANK key start stop

移除成员，下标在start stop之间

ZREMRANGEBYSCORE key min max

移除成员，score在min与max之间

ZINTERSTORE destination numkeys key [key …] [WEIGHTS weight [weight …]] [AGGREGATE SUM|MIN|MAX]

计算有序集交集

ZUNIONSTORE

计算有序集并集

排序

sort 数值排序

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>SORT(<span class="hljs-string">'a'</span>);   <span class="hljs-comment">//返回排序结果</span></code>

alpha限定按字符排序

<code class=" hljs php"><span class="hljs-variable">$redis</span>->SORT(<span class="hljs-string">'a'</span>,<span class="hljs-keyword">array</span>(<span class="hljs-string">'ALPHA'</span>=><span class="hljs-keyword">TRUE</span>)); <span class="hljs-comment">//返回排序结果</span></code>

limit限定返回数量

<code class=" hljs php"><span class="hljs-variable">$redis</span>->SORT(<span class="hljs-string">'a'</span>,<span class="hljs-keyword">array</span>(<span class="hljs-string">'LIMIT'</span>=><span class="hljs-keyword">array</span>(<span class="hljs-number">0</span>,<span class="hljs-number">5</span>));</code>

SORT限定正序倒序

<code class=" hljs php"><span class="hljs-variable">$redis</span>->SORT(<span class="hljs-string">'a'</span>,<span class="hljs-keyword">array</span>(<span class="hljs-string">'SORT'</span>=><span class="hljs-string">'DESC'</span>));</code>

by外部排序

<code class=" hljs php"><span class="hljs-variable">$redis</span>->SORT(<span class="hljs-string">'a'</span>,<span class="hljs-keyword">array</span>(<span class="hljs-string">'BY'</span>=><span class="hljs-string">''</span>));</code>

排序其它用法较多，这里不再详细一一列举。

生命周期

ttl、expire、expireat

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span><span class="hljs-built_in">set</span>(<span class="hljs-string">'a'</span>,<span class="hljs-number">12345</span>);<span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>expire(<span class="hljs-string">'a'</span>,<span class="hljs-number">30</span>); <span class="hljs-comment">//单位秒</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>expireat(<span class="hljs-string">'a'</span>,<span class="hljs-string">'1435152916'</span>); <span class="hljs-comment">//接受时间戳</span>echo <span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>get(<span class="hljs-string">'a'</span>);  <span class="hljs-comment">//如果已经过期，返回false</span>echo <span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>ttl(<span class="hljs-string">'a'</span>);  <span class="hljs-comment">//返回剩余时间（秒）。如果未赋expire值，返回-1；如果键不存在，也返回-1</span></code>

persit移除生存时间

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>persist(<span class="hljs-string">'a'</span>);</code>

数据库操作

选择数据库

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span><span class="hljs-keyword">SELECT</span>(<span class="hljs-number">0</span>);    <span class="hljs-comment">//默认就是数据库0 </span></code>

清除

<code class=" hljs lasso"><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>FLUSHALL(); <span class="hljs-comment">//删除所有数据库</span><span class="hljs-variable">$redis</span><span class="hljs-subst">-></span>flushdb();  <span class="hljs-comment">//删除当前数据库所有key</span></code>