如何使用PHP持续监听Redis的消息订阅并处理多台服务器的消息？

<?php

$redis = new Redis();
$redis->connect('127.0.0.1', 6379); // Redis服务器地址和端口号
$redis->subscribe(['chat-room'], 'processMessage'); // 订阅名为chat-room的频道，并指定回调函数processMessage

function processMessage($redis, $channel, $message)
{
    // 处理接收到的消息，例如将消息推送给聊天室的在线用户
    echo "Received message from channel {$channel}: {$message}
";
    // 在这里实现将消息推送给聊天室的在线用户的逻辑
}

<?php

$redis = new Redis();
$redis->connect('127.0.0.1', 6379); // Redis服务器地址和端口号
$redis->publish('chat-room', 'Hello, world!'); // 向名为chat-room的频道发布一条消息

<?php

$redis = new Redis();
$redis->connect('127.0.0.1', 6379); // Redis服务器地址和端口号
$redis->subscribe(['chat-room'], 'processMessage');

function processMessage($redis, $channel, $message)
{
    // 处理接收到的消息，例如将消息推送给聊天室的在线用户
    echo "Received message from channel {$channel}: {$message}
";
    
    // 向其他服务器发送消息
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, 'http://other-server/process-message.php');
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, [
        'channel' => $channel,
        'message' => $message,
    ]);
    curl_exec($curl);
    curl_close($curl);
}

<?php

$channel = $_POST['channel'];
$message = $_POST['message'];

// 在这里实现将消息推送给聊天室的在线用户的逻辑
echo "Received message from channel {$channel}: {$message}
";