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Redis系列-php如何通过redis扩展使用redis

Jun 13, 2016 am 11:17 AM
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Redis系列-php怎么通过redis扩展使用redis

通过前面几篇blog,我们应该对redis有个大致的认识,这里再讲解下,php怎么连接redis服务器进行数据读写?


1、安装php扩展

a)安装php扩展phpredis:

[[email protected] tool]# git clone https://github.com/nicolasff/phpredis.git phpredis[[email protected] tool]# cd phpredis/[[email protected] phpredis]# /usr/local/php/bin/phpize   #<span style="text-indent: 20px;">假设 php目录:</span><span style="text-indent: 20px;">/usr/local/php</span>[[email protected] phpredis]# ./configure --with-php-config=/usr/local/php/bin/php-config[[email protected] phpredis]# make[[email protected] phpredis]# make install
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如果顺利,将得到类似如下提示:

Installing shared extensions:     /usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/
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php扩展文件目录下,将有个redis.so文件。

b)加载redis.so

在php.ini 文件中,添加配置:

[redis]extension=redis.so
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重启web服务器,echo phpinfo() ,将看到大致如下显示:

 

 2、通过扩展访问redis服务器

php如何使用redis服务器存取数据?无非是经过phpredis扩展模块,通过如下几个步骤:

1、实例化redis类   【new redis()】

2、调用redis类方法,连接redis服务器 【connect,pconnect】

3、设置连接选项【setOption】

4、存/取数据 

5、关闭连接 【close】

如果使用默认选项,步骤3不需要。请参看下面的代码示例:  

<?php $redis = new Redis(); #实例化redis类$redis->connect('127.0.0.1'); #连接服务器$redis->set('key', 'hello '); #调用方法,设置string类型值$redis->append('key', 'world'); #修改string类型值echo $redis->get('key');  #获取redis key的值,并输出显示 echo $redis->type('key'); #获取key 的数据类型echo $redis->echo('will close...');# 输出字符串$redis->close(); #关闭连接
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 通过上面的代码,我们基本完成一个简单redis的存取操作。下面罗列一些Redis类的一些属性及方法

a)连接redis server:

  • connect :连接server
  • pconnect :长连接
  • auth :权限验证
  • select :选择DB
  • close : 关闭连接
  •   setOption : 设置 client 选项
  • getOption : 获取client选项
  • ping : ping redis server
  •  echo : 输出 字符串

注意,如果频繁操作redis,不停地connect 和close会很耗性能的,这个时候,建议用pconnect 建立个长连接

b)字符串读写函数

  • append  :在值的后面追加值
  • decr :递减一个key的值
  • incr :递增一个key的值
  • get :获取一个值
  • set :设置一个值
  • getSet :设置值,并返回老值
  • mGet :批量获取值
  • mSet :批量设置值
  • strlen :获取值长度

注意:如果能用批量操作尽量用批量,减少频繁连接redis数据库性能

c)hash读写函数

  • hDel :删除一个多个域
  • hExists :判断一个hash域是否存在
  • hGet :获取hash域的值
  • hGetAll :获取所有域值
  • hIncrBy :自增长一个hash int域的值
  • hKeys :获取hash 所有域
  • hLen :获取域个数
  • hMGet :批量获取域的值
  • hMSet :批量设置域的值
  • hSet :设置域的值
  • hVals:得到所有域的值

d)list读写函数

  • lInsert:插入元素
  • lLen:list长度
  • lPop:移除并获取第一个颜色
  • lPush:插入一个元素
  • lRem:移除元素
  • lSet:设置元素值

e)set

  • sAdd:增加一个或多个成员
  • sIsMember:是否包含
  • sMembers:得到成员
  • sMove:移动成员
  • sPop:移除成员
  • sRandMember:得到随机成员
  • sRem:删除

f)sorted set

  • zAdd:增加一个或多个
  • zCard:成员个数
  • zIncrBy:递增成员score
  • zRange:返回索引范围内的成员
  • zRangeByScore :返回score范围内的成员
  • zScore:获取成员score
  • zRem:移除一个或多个成员

更多信息请参考:https://github.com/nicolasff/phpredis

http://redis.io/clients

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