• 查找redis.conf在那个目录，命令：find / -name redis.conf

• 进入目录,命令：vi /usr/local/redis/etc/redis.conf

• 查找notify-keyspace-events，添加EX
  

• 重启redis服务,命令：systemctl restart redis.service

• redis配置页面 NewRedis.php

    <?php
    class NewRedis
    {
    private $redis;
  
    public function __construct($host = '127.0.0.1', $port = 6379)
    {
        $this->redis = new \Redis();
        $this->redis->connect($host, $port);
    }
  
    public function setex($key, $time, $val)
    {
        return $this->redis->setex($key, $time, $val);
    }
  
    public function set($key, $val)
    {
        return $this->redis->set($key, $val);
    }
  
    public function get($key)
    {
        return $this->redis->get($key);
    }
  
    public function expire($key = null, $time = 0)
    {
        return $this->redis->expire($key, $time);
    }
  
    public function psubscribe($patterns = array(), $callback)
    {
        $this->redis->psubscribe($patterns, $callback);
    }
  
    public function setOption()
    {
        $this->redis->setOption(\Redis::OPT_READ_TIMEOUT, -1);
    }

  }

• 服务器开启监听 psubscribe.php,Linux运行指令：php psubscribe.php,页面代码如下：

  <?php
    require_once './NewRedis.php';
    $redis = new NewRedis();
    // 解决Redis客户端订阅时候超时情况
    $redis->setOption();
    $redis->psubscribe(array('__keyevent@0__:expired'), 'keyCallback');
    // 回调函数,这里写处理逻辑
    function keyCallback($redis, $pattern, $chan, $msg)
    {
        echo "Pattern: $pattern\n";
        echo "Channel: $chan\n";
        echo "Payload: $msg\n";
        echo "订单号为：{$msg}的订单已失效";
    }

• 客户端访问index.php,页面代码如下：

    <?php
    require_once './NewRedis.php';
    $redis = new NewRedis();
    $order_id = 123;
    $redis->setex('order_id1',20,$order_id);

特别感谢

参考博客：监听redis key失效触发回调事件

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