PHP+Redis publish and subscribe

Tip:

redis publish and subscribe notification is based on socket, the connection timeout is affected by the configuration, you can modify php.ini , or add

ini_set('default_socket_timeout', -1);

dynamically

pub.php

```
$redis = new Redis();
// 第一个参数为redis服务器的ip,第二个为端口
$res = $redis->connect('127.0.0.1', 6379);
// test为发布的频道名称,hello,world为发布的消息
$res = $redis->publish('test','hello,world');
```

sub.php

```
$redis = new Redis();
$res = $redis->connect('127.0.0.1', 6379,0);
$redis->subscribe(array('test'), 'callback');
// 回调函数,这里写处理逻辑
function callback($instance, $channelName, $message) {
    echo $channelName, "==>", $message,PHP_EOL;
}
```

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