How PHP and Unity3D combine to use Workerman to build a multiplayer online role-playing game

How PHP and Unity3D combine to use Workerman to build a multiplayer online role-playing game

Introduction:
Today, multiplayer online role-playing games (MMORPG) have become a high-profile player in the game market A type of game. As developers, we often need to use different technologies to implement this type of game. This article will introduce how to use PHP and Unity3D combined with the Workerman framework to build a simple MMORPG game.

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1. Introduction to Workerman Framework
   Workerman is a high-performance PHP Socket framework that can be used to build high-performance network applications, such as instant messaging, game servers, etc. . It uses PHP's underlying extensions Swoole and PCNTL to implement advanced features such as long connections, asynchronous IO, and multi-processes. In this article, we will use Workerman to build a game server.
2. Unity3D game scene construction
   First, we need to create a game scene in Unity3D and set up the corresponding character model and animation. In this scenario, we need to add a network connection component to communicate with the server. We can use the UNET network component that comes with Unity3D, or use third-party plug-ins such as Photon Unity Networking.
3. Communication between client and server
   In Unity3D, we can use C# language to write communication code with the server. First, we need to establish a connection with the server in the client code and implement the corresponding data transfer protocol. For example, we can use JSON as the format for data transmission to achieve communication between the client and the server by sending and receiving JSON data.
4. Server-side writing
   Using the Workerman framework, we can use PHP to write game logic on the server side. We need to create a server script that listens to the specified port and handles the connection with the client, data transmission, etc. In this server script, we can write game logic code, such as character movement, skill release, collision detection, etc.

The following is a simple server script example:

<?php
require_once 'workerman/Autoloader.php';

use WorkermanWorker;

// 创建一个Worker监听指定端口
$worker = new Worker('tcp://0.0.0.0:8080');

// 当收到客户端的连接时触发
$worker->onConnect = function ($connection) {
    echo "Client connected" . PHP_EOL;

    // 向客户端发送欢迎消息
    $connection->send('Welcome to the game server');
};

// 当收到客户端发来的数据时触发
$worker->onMessage = function ($connection, $data) {
    echo "Receive data from client: " . $data . PHP_EOL;

    // 处理客户端发送的数据，并返回处理结果
    $result = processGameData($data);
    $connection->send($result);
};

// 当客户端连接断开时触发
$worker->onClose = function ($connection) {
    echo "Client disconnected" . PHP_EOL;
};

// 运行Worker
Worker::runAll();

In this example, we first introduce the Workerman framework and create a Worker instance to listen to port 8080. Then, we handle the client's connection, data transmission and disconnection operations by setting event callback functions such as onConnect, onMessage and onClose. In the onMessage callback function, we can write our game logic code and return the processing results to the client by calling the $connection->send() method.

5. Real-time interaction between client and server
   Through the above steps, we have established a simple communication mechanism between client and server. However, to implement a real-time MMORPG game, we also need to implement real-time interaction between the client and the server. In Unity3D, we can use timers or coroutines to implement the function of the client regularly sending data to the server. On the server side, we can use timers to push data to all online clients.

Summary:
This article introduces the basic steps of how to use PHP and Unity3D combined with the Workerman framework to build a multiplayer online role-playing game. In this process, we need to create the game scene in Unity3D and set up the corresponding network connection components. Then, we need to write the communication code with the server on the client side and the server side respectively. Finally, we use the Workerman framework to write game logic code on the server side and achieve real-time interaction between the client and the server. I hope this article can be helpful to beginners in developing MMORPG games.

Code reference:

• Workerman official website: http://www.workerman.net/
• Unity3D official website: https://unity3d.com/

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