一、异步redis服务安装

Swoole官方文档入门指引->快速起步->异步Redis客户端

1、swoole使用异步redis前置条件

• redis服务
• hiredis库（X）
• 编译swoole需要加入--enable-async-redis（X）

注意：如果您的 swoole版本为4.3以上，则只需要安装redis服务即可，hiredis库和重新编译swoole都不需要在做了，因为4.3以上版本已经内置了。

2、源码安装redis

在 Redis官网下载最新版本到本地，然后解压缩。

Download, extract and compile Redis with:

$ wget http://download.redis.io/releases/redis-5.0.5.tar.gz
$ tar xzf redis-5.0.5.tar.gz
$ cd redis-5.0.5
$ make

The binaries that are now compiled are available in the src directory. Run Redis with:
redis解压缩目录：./redis-5.0.5/src/redis-server

$ src/redis-server

You can interact with Redis using the built-in client:

$ src/redis-cli
redis> set foo bar
OK
redis> get foo
"bar"

3、hiredis安装(swoole4.3以上不需要安装)

hiredis库最终编译为一个so文件，然后去使用它。

hiredis下载地址：https://github.com/redis/hire…

使用命令下载到本地，然后解压缩：

$ wget https://github.com/redis/hiredis/archive/v0.14.0.tar.gz
$ mv v0.14.0.tar.gz hiredis-v0.14.0.tar.gz
$ tar xzf hiredis-v0.14.0.tar.gz
$ cd hiredis-0.14.0

编译安装：

$ make -j
$ sudo make install
$ sudo ldconfig

4、重新编译swoole(swoole4.3以上不需要重新编译)

进入 swoole 安装包目录：

$ cd /work/study/softpackage/swoole

查看configure的参数命令：

$ ./configure --help

显示：

...

Optional Features and Packages:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
  --with-libdir=NAME      Look for libraries in .../NAME rather than .../lib
  --with-php-config=PATH  Path to php-config php-config
  --enable-debug-log        Enable swoole debug log
  --enable-trace-log        Enable swoole trace log
  --enable-sockets          Do you have sockets extension?
  --enable-openssl          Use openssl?
  --enable-http2            Use http2.0?
  --enable-swoole           Enable swoole support
  --enable-mysqlnd          Do you have mysqlnd?
  --with-openssl-dir=DIR    Include OpenSSL support (requires OpenSSL >= 0.9.6)
  --with-jemalloc-dir=DIR   Include jemalloc support
  --enable-asan             Enable asan
  --enable-gcov             Enable gcov
  --enable-debug,         compile with debug symbols
  --enable-shared=PKGS    Build shared libraries default=yes
  --enable-static=PKGS    Build static libraries default=yes
  --enable-fast-install=PKGS
                          Optimize for fast installation default=yes
  --with-gnu-ld           Assume the C compiler uses GNU ld default=no
  --disable-libtool-lock  Avoid locking (might break parallel builds)
  --with-pic              Try to use only PIC/non-PIC objects default=use both
  --with-tags=TAGS        Include additional configurations automatic

这里怎么没有找到 --enable-async-redis这个参数呢？查了一下swoole官方文档，原来从 swoole4.3 版本使用hireidis已经不需要再重新编译了，swoole已经内置了，直接使用即可。-_-!

官网相关说明：https://wiki.swoole.com/wiki/…

二、代码实现

开启redis服务：

$  src/redis-server

reids.php

<?php

const REDIS_SERVER_HOST = '127.0.0.1';
const REDIS_SERVER_PORT = 6379;


go(function () {
    $redis = new Swoole\Coroutine\Redis();
    $redis->connect(REDIS_SERVER_HOST, REDIS_SERVER_PORT);
    $redis->setDefer();
    $redis->set('key1', 'value');

    $redis2 = new Swoole\Coroutine\Redis();
    $redis2->connect(REDIS_SERVER_HOST, REDIS_SERVER_PORT);
    $redis2->setDefer();
    $redis2->get('key1');

    $result1 = $redis->recv();
    $result2 = $redis2->recv();

    var_dump($result1, $result2);
});

执行打印：

$ php redis.php
bool(true)
string(5) "value"