Workerman development: How to implement chat room function

Workerman Development: How to implement the chat room function

Introduction:
With the development of instant messaging technology, chat rooms have become a common feature of many websites and applications . In this article, we will introduce how to develop a simple chat room using the PHP framework Workerman and provide specific code examples.

1. Introduction to Workerman:
Workerman is a high-performance asynchronous, multi-process network framework based on PHP, similar to the functions of Node.js. It uses the features of PHP multi-process and asynchronous I/O, which can greatly improve performance and concurrent processing capabilities compared with traditional PHP applications.

2. Chat room function implementation:
The following is a simple chat room function implementation example:

1. Create a new Workerman application:
   First we need to create a new Workerman application, use the following command in the terminal:

   composer require workerman/workerman

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   Then create a new PHP file in the root directory of the project, for example chatroom.php, and Add the following code in the file:

   require_once './vendor/autoload.php';
   
   use WorkermanWorker;
   
   $worker = new Worker("websocket://0.0.0.0:8000");
   
   $worker->onConnect = function($connection) {
    // 新用户连接时触发的回调函数
   };
   
   $worker->onMessage = function($connection, $data) {
    // 收到客户端消息时触发的回调函数
   };
   
   $worker->onClose = function($connection) {
    // 用户断开连接时触发的回调函数
   };
   
   Worker::runAll();

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2. Implement the logic when new users connect:
   In the $worker->onConnect callback function, we can Implement the logic when new users connect, such as saving connection information to global variables and broadcasting the addition of new users to all connected clients. The code example is as follows:

   $worker->onConnect = function($connection) {
    global $worker;
    $worker->connections[$connection->id] = $connection;
    
    foreach($worker->connections as $conn) {
        $conn->send('New user joined the chatroom.');
    }
   };

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3. Implement the logic when receiving the client message:
   In the $worker->onMessage callback function, we can Specific business logic to handle received client messages. For example broadcasting a message to all connected clients. The code example is as follows:

   $worker->onMessage = function($connection, $data) {
    global $worker;
     
    foreach($worker->connections as $conn) {
        $conn->send('User ' . $connection->id . ' says: ' . $data);
    }
   };

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4. Implement the logic when the user disconnects:
   In the $worker->onClose callback function, we can implement the user Logic when disconnecting, such as removing the disconnected user from global variables and broadcasting the user's departure message to other connected clients. The code example is as follows:

   $worker->onClose = function($connection) {
    global $worker;
    unset($worker->connections[$connection->id]);
    
    foreach($worker->connections as $conn) {
        $conn->send('User ' . $connection->id . ' left the chatroom.');
    }
   };

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5. Start the chat room server:
   Run the following command in the terminal to start the chat room server:

   php chatroom.php start

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三, Summary:
By using the Workerman framework, we can easily implement a simple chat room function. In actual development, we can continuously expand and improve the functions of the chat room according to specific needs, such as adding user authentication, private chat functions, etc.

The function in the code example is just a basic chat room function example, and the specific implementation method can be adjusted and expanded according to actual needs. I hope this article will help you understand how to use Workerman to develop chat room functions.

Reference link:

• Workerman official document: http://doc.workerman.net/
• Workerman GitHub repository: https://github.com/ walkor/Workerman

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