Workerman Network Programming Practice: An Example of Building a Real-Time Data Synchronization System

Introduction:
With the continuous development and application of Internet technology, real-time data synchronization has become one of the core requirements of many current systems and applications. one. Network programming is a key technology when implementing real-time data synchronization systems. This article will introduce how to use the Workerman network programming framework to build a simple and practical real-time data synchronization system, and explain it in detail with code examples.

1. What is Workerman?
Workerman is a high-performance PHP network programming framework. It is based on PHP's asynchronous non-blocking event-driven model and can achieve high-concurrency network communication. Workerman can handle thousands of concurrent connections and is ideal for building high-performance network applications such as real-time data synchronization systems.

2. Real-time data synchronization system design plan
We will use Workerman to build a simple real-time data synchronization system. The system includes two roles, namely the server and the client. The server receives the messages sent by the client and pushes them to all connected clients to achieve real-time data synchronization.

1. Server design:
The server needs to create a Workerman instance and listen to the specified port, waiting for the client's connection. Once a client connects successfully, the server will maintain a client connection pool and send the received message to all connected clients.

2. Client design:
The client needs to connect to the server and send its own messages. When the server receives the message, it will be pushed to all clients.

3. Code Examples
The following are code examples for the server and client, demonstrating how to use Workerman to build a real-time data synchronization system.

Server code example:

require_once './Workerman/Autoloader.php';

use WorkermanWorker;

// Create a Worker to listen to the specified port and use the tcp transmission protocol
$worker = new Worker('tcp://127.0.0.1:2345');

// Start 4 processes to provide external services
$worker->count = 4;

//Callback function when the client connects
$worker->onConnect = function ($connection) {

echo "New client connected: " . $connection->id . "

";

global $worker;

// 向所有客戶端推送新連接信息
foreach ($worker->connections as $conn) {
    $conn->send("New client connected: " . $connection->id);
}

// 將新連接加入連接池
$worker->connections[$connection->id] = $connection;

};

//Callback function when the client disconnects
$worker->onClose = function ($connection) {

echo "Client disconnected: " . $connection->id . "

";

global $worker;

// 向所有客戶端推送斷開連接信息
foreach ($worker->connections as $conn) {
    $conn->send("Client disconnected: " . $connection->id);
}

// 從連接池中移除斷開的連接
unset($worker->connections[$connection->id]);

};

//Callback function when the client receives the message
$worker->onMessage = function ($connection, $data) {

echo "Receive message from client: " . $data . "

";

global $worker;

// 向所有客戶端推送接收到的消息
foreach ($worker->connections as $conn) {
    $conn->send("Message from client " . $connection->id . ": " . $data);
}

};

// Run Worker
Worker::runAll();

Client code example:

require_once './Workerman/Autoloader.php';

use WorkermanWorker;

// Create a Worker to connect to the specified server address and port
$worker = new Worker('tcp://127.0.0.1:2345');

// Callback function when successfully connecting to the server
$worker->onConnect = function ($connection) {

echo "Connect to server success

";

$connection->send("Hello, server");
$connection->onMessage = function ($connection, $data) {
    echo "Receive message from server: " . $data . "

";

};
$connection->onClose = function () {
    echo "Server connection closed

";

};

};

// Run Worker
Worker::runAll();

4. Experimental results and discussion
Through the above code examples, we can run the server and client scripts, and then observe the interaction between them. When the client connects successfully, the server and other clients will receive notifications about the new connection; when a client disconnects, the server and other clients will also receive corresponding notifications. Messages sent by the client will be forwarded by the server to all clients, realizing simple real-time data synchronization.

Summary:
This article introduces an example of using the Workerman network programming framework to build a real-time data synchronization system. Through a large number of code examples, the design and implementation of the server and client are explained in detail, and relevant experiments and discussions are conducted. I hope this article will be helpful to developers who are learning and practicing network programming.

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