一、安装扩展
1.下载并编译安装

wget https://github.com/phpredis/phpredis/archive/3.0.0.tar.gz
tar zxvf 3.0.0.tar.gz
cd phpredis-3.0.0/

phpize
./configure --with-php-config=/usr/local/php/bin/php-config
make
make install

2.在配置文件/usr/local/php/etc/php.ini中加入

extension="redis.so"

3.重启PHP服务 nginx、apache 或 php-fpm

二、安装Redis

wget http://download.redis.io/releases/redis-3.2.5.tar.gz
tar zxvf redis-3.2.5.tar.gz
cd redis-3.2.5
make
make install

make install 之后，会在/usr/local/bin下面生成几个文件 redis-benchmark redis-check-aof redis-check-rdb redis-cli redis-server

移动文件，便于管理：(所有源代码安装的软件都安装在/usr/local下)
创建两个文件夹，bin用于存放命令，etc用于存放配置文件。

mkdir -p /usr/local/redis/bin
mkdir -p /usr/local/redis/etc

将redis-3.2.5文件夹下的redis.conf复制到/usr/local/redis/etc/

修改配置文件中的 daemonize no 改为 daemonize yes，可以在后台运行redis

配置启动项 utils 文件夹下面的 redis_init_script 文件
cp redis_init_script /etc/init.d/redisd

#!/bin/bash
# chkconfig:   2345 90 10
# Simple Redis init.d script conceived to work on Linux systems
# as it does use of the /proc filesystem.

REDISPORT=6379
EXEC=/usr/local/redis/bin/redis-server
CLIEXEC=/usr/local/redis/bin/redis-cli

PIDFILE=/var/run/redis_${REDISPORT}.pid
CONF="/usr/local/redis/etc/redis.conf"

case "$1" in
    start)
        if [ -f $PIDFILE ]
        then
                echo "$PIDFILE exists, process is already running or crashed"
        else
                echo "Starting Redis server..."
                $EXEC $CONF
                echo "Redis started"
        fi
        ;;
    stop)
        if [ ! -f $PIDFILE ]
        then
                echo "$PIDFILE does not exist, process is not running"
        else
                PID=$(cat $PIDFILE)
                echo "Stopping ..."
                $CLIEXEC -p $REDISPORT shutdown
                while [ -x /proc/${PID} ]
                do
                    echo "Waiting for Redis to shutdown ..."
                    sleep 1
                done
                echo "Redis stopped"
        fi
        ;;
    status)
        if netstat -tnpl | grep -q redis-server; then
            PID=`pidof redis-server`
            echo "Redis (pid $PID) is running..."
        else
            echo "Redis is stopped"
            exit 0
        fi
        ;;
    restart)
        $0 stop
        sleep 1
        $0 start
        ;;
    *)
        echo "Please use start or stop as first argument"
        ;;
esac

chkconfig redisd on