基于PHP的实时聊天系统的升级与扩展方法

// 创建数据库连接
$connection = new mysqli($host, $username, $password, $database);

// 插入消息
$roomId = 1;
$userId = 1001;
$message = "Hello world!";
$sql = "INSERT INTO messages(room_id, user_id, message) VALUES (?, ?, ?)";
$stmt = $connection->prepare($sql);
$stmt->bind_param("iis", $roomId, $userId, $message);
$stmt->execute();
$stmt->close();

// 查询消息
$roomId = 1;
$sql = "SELECT * FROM messages WHERE room_id = ? ORDER BY created_at DESC LIMIT 10";
$stmt = $connection->prepare($sql);
$stmt->bind_param("i", $roomId);
$stmt->execute();
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
    // 处理每条消息
    echo $row['message'];
}
$stmt->close();

// 发送消息到消息队列
$roomId = 1;
$userId = 1001;
$message = "Hello world!";
$messageData = [
    'room_id' => $roomId,
    'user_id' => $userId,
    'message' => $message
];
$queue->push(json_encode($messageData));

// 从消息队列中获取消息并处理
$message = $queue->pop();
$messageData = json_decode($message);
$roomId = $messageData->room_id;
$userId = $messageData->user_id;
$message = $messageData->message;
// 处理消息并发送给聊天室或用户

// 获取聊天室的在线用户列表
$roomId = 1;
$users = $redis->get("room:$roomId:users");
if ($users === false) {
    // 从数据库中查询在线用户列表并缓存
    $users = $db->query("SELECT * FROM users WHERE room_id = $roomId");
    $redis->set("room:$roomId:users", serialize($users));
}
$users = unserialize($users);
// 处理用户列表

// 在Web端使用Socket.io连接实时聊天服务器
var socket = io.connect('https://example.com');
socket.emit('join', { room: 'room1' });
socket.on('message', function(data) {
    // 处理收到的消息
    console.log(data.message);
});

// 在移动端使用原生WebSocket连接实时聊天服务器
var socket = new WebSocket('wss://example.com');
socket.onopen = function() {
    socket.send('{"room":"room1","user":"user1","message":"Hello"}');
};
socket.onmessage = function(event) {
    // 处理收到的消息
    console.log(event.data);
};

// 在桌面端使用原生WebSocket连接实时聊天服务器
var socket = new WebSocket('wss://example.com');
socket.onopen = function() {
    socket.send('{"room":"room1","user":"user1","message":"Hello"}');
};
socket.onmessage = function(event) {
    // 处理收到的消息
    console.log(event.data);
};

// 发送消息推送
$messageData = [
    'room_id' => 1,
    'user_id' => 1001,
    'message' => 'Hello world!'
];
$pushService->send(json_encode($messageData), 'user1');

// 接收消息推送
$pushService->listen(function($message) {
    $messageData = json_decode($message);
    // 处理收到的推送消息
});