PHP中redis的用法深入解析_PHP
redis是一个key-value存储系统。和Memcached类似,它支持存储的value类型相对更多,包括string(字符串)、list(链表)、set(集合)和zset(有序集合)。这些数据类型都支持push/pop、add/remove及取交集并集和差集及更丰富的操作,而且这些操作都是原子性的。在此基础上,redis支持各种不同方式的排序。与memcached一样,为了保证效率,数据都是缓存在内存中。区别的是redis会周期性的把更新的数据写入磁盘或者把修改操作写入追加的记录文件,并且在此基础上实现了master-slave(主从)同步。
Redis 是一个高性能的key-value数据库。redis的出现,很大程度补偿了memcached这类keyvalue存储的不足,在部 分场合可以对关系数据库起到很好的补充作用。它提供了Python,Ruby,Erlang,PHP客户端,使用很方便。
若想在PHP中使用redis,首先要先安装redis。然后在PHP中配置扩展。
1.安装redis。
首先下载好redis安装文件,解压到D盘或其他盘。
然后通过Dos命令行进行安装。
把这个文件夹复制到其它地方,比如D:\redis 目录下。
打开一个cmd窗口 使用cd命令切换目录到D:\redis 运行 redis-server.exe redis.conf
如果想方便的话,可以把redis的路径加到系统的环境变量里,这样就省得再输路径了,后面的那个redis.conf可以省略,如果省略,会启用默认的。输入之后,会显示如下界面:
这时候另启一个cmd窗口,原来的不要关闭,不然就无法访问服务端了
切换到redis目录下运行 redis-cli.exe -h 127.0.0.1 -p 6379 出现下图:
这时候,就已经完成配置了。
完成了配置之后,要在PHP中添加redis的扩展,之后才可以用PHP灵活的使用它。
在windows下安装php的redis扩展非常简单,下载一个.dll扩展包放到php的ext目录下,在php.ini里边添加一行配置就可以了。
php代码测试
$redis = new Redis();
$redis->connect(‘127.0.0.1′,6379);
$redis->set(‘test','hello world!');
echo $redis->get(‘test');
输出hello world!

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