Implement the long connection retention function in the Workerman document

To implement the long connection maintenance function in the Workerman document, specific code examples are required

Workerman is a PHP asynchronous multi-process network programming framework that can be used to create high-performance TCP/UDP server. One of its features is that it supports long connection communication and can maintain a stable connection with the client. In order to implement this function, we need to write corresponding code. The following is a simple example:

// 引入Workerman的Autoloader
require_once '/path/to/Workerman/Autoloader.php';

// 创建一个Worker监听端口
$worker = new Worker('tcp://0.0.0.0:8000');

// 设置worker进程数
$worker->count = 4;

// 当客户端与服务端建立连接时触发的回调函数
$worker->onConnect = function($connection) {
    echo "New connection established
";

    // 设置连接的保持时间为1800秒（30分钟）
    $connection->onWebSocketConnect = function($connection) {
        $connection->maxLifetime = 1800;
    };
};

// 当收到客户端数据时触发的回调函数
$worker->onMessage = function($connection, $data) {
    echo "Received data: " . $data . "
";

    // 向客户端发送响应数据
    $connection->send("Hello, client!");
};

// 当客户端与服务端断开连接时触发的回调函数
$worker->onClose = function($connection) {
    echo "Connection closed
";
};

// 运行worker
Worker::runAll();

In the above code, we created a TCP server listening on port 8000. When the client establishes a connection with the server, the onConnect callback function will be called. In this function, we can set the connection retention time. In this example, we set the maxLifetime property to 1800 seconds, that is, the connection will be maintained for 30 minutes. When the data sent by the client is received, the onMessage callback function will be called. In this function, we can process the client's request and send response data to the client. When the client disconnects, the onClose callback function will be called.

Through the above code, we have implemented Workerman’s long connection maintenance function. After the client establishes a connection with the server, it can continue to communicate and maintain the connection until the set hold time is reached or the client actively disconnects. This is very useful for real-time data transmission, instant messaging, online games and other scenarios.

Of course, to run the above example code, we need to install the Workerman framework in advance and replace /path/to/Workerman/Autoloader.php with the actual Workerman framework file path. In addition, as needed, we can further optimize the code and expand functions according to business needs.

In short, using the Workerman framework can easily realize the long connection maintenance function, providing developers with a more flexible and efficient network programming solution. Hope the above sample code is helpful to you.

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