workerman实现在线聊天的主要技术挑战和解决方案

// Worker类的onConnect事件回调中发送心跳包
$worker->onConnect = function($connection) {
    $connection->send('{"action":"heartbeat"}');
};

// Worker类的onMessage事件回调中处理心跳包
$worker->onMessage = function($connection, $data) {
    $data = json_decode($data, true);
    if ($data['action'] == 'heartbeat') {
        $connection->send('{"action":"heartbeat"}');
        return;
    }
    // 处理其他业务逻辑
};

// Worker类的onWorkerStart事件回调中添加跨域设置
$worker->onWorkerStart = function($worker) {
    // 设置Access-Control-Allow-Origin头信息
    header('Access-Control-Allow-Origin: *');
};

// Worker类的onMessage事件回调中处理私聊和群聊消息
$worker->onMessage = function($connection, $data) {
    $data = json_decode($data, true);
    if ($data['action'] == 'private') {
        // 处理私聊消息
        $receiver = $data['receiver'];
        $message = $data['message'];
        // 将消息发送给指定用户
        $worker->connections[$receiver]->send('{"action":"private", "message":"'.$message.'"}');
    } elseif ($data['action'] == 'group') {
        // 处理群聊消息
        $message = $data['message'];
        // 将消息广播给所有连接
        foreach ($worker->connections as $conn) {
            $conn->send('{"action":"group", "message":"'.$message.'"}');
        }
    }
};