PHP Websocket development tutorial to easily implement online game functions-PHP Tutorial-php.cn

PHP Websocket development tutorial to easily implement online game functions

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Release： 2023-12-02 11:10:02

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PHP Websocket开发教程，轻松实现在线游戏功能

PHP Websocket development tutorial, easily implement online game functions, specific code examples are required

Websocket is a full-duplex communication protocol, which can be used in Web applications Real-time data transmission and interactive functions are realized. This article will introduce how to use PHP to develop Websocket, and how to use Websocket to easily implement online gaming functions.

1. Basic knowledge of PHP Websocket

Before we start, we need to understand some basic knowledge of PHP Websocket.

What is Websocket?

Websocket is a TCP-based protocol that allows two-way communication between a server and a client. Different from the traditional HTTP request-response model, Websocket can enable the server to actively push data to the client and update page content in real time.

The working principle of Websocket

The working principle of Websocket is very simple. It first establishes a connection with the server through the HTTP protocol, and then upgrades the protocol to Websocket. Once the connection is successfully established, the server and client can achieve two-way communication by sending messages.

How to implement PHP Websocket

PHP Websocket can be implemented through third-party libraries, the most commonly used ones are Ratchet and Swoole. This article will use Ratchet as an example to introduce the specific implementation method.

2. Install Ratchet

Ratchet is a PHP Websocket library that can help us quickly build a Websocket server. We can install it through Composer.

Execute the following command in the project root directory to install Composer:

curl -sS https://getcomposer.org/installer | php

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Create a composer.json file in the project root directory and add the following content:

{
    "require": {
        "cboden/ratchet": "^0.4"
    }
}

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Execute the following command to install Ratchet:

php composer.phar install

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3. Create a Websocket server

Next, we will create a simple Websocket server, and implement some basic functions.

Create a file named server.php and add the following code:

<?php
use RatchetServerIoServer;
use RatchetHttpHttpServer;
use RatchetWebSocketWsServer;

require 'vendor/autoload.php';

class MyServer implements RatchetMessageComponentInterface {
    protected $clients;

    public function __construct() {
        $this->clients = new SplObjectStorage;
    }

    public function onOpen(RatchetConnectionInterface $conn) {
        $this->clients->attach($conn);
        echo "New connection! ({$conn->resourceId})
";
    }

    public function onMessage(RatchetConnectionInterface $from, $msg) {
        foreach ($this->clients as $client) {
            $client->send($msg);
        }
    }

    public function onClose(RatchetConnectionInterface $conn) {
        $this->clients->detach($conn);
        echo "Connection closed! ({$conn->resourceId})
";
    }

    public function onError(RatchetConnectionInterface $conn, Exception $e) {
        echo "An error occurred: {$e->getMessage()}
";
        $conn->close();
    }
}

$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new MyServer()
        )
    ),
    8080
);

$server->run();

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Execute the following command to start the Websocket server:

php server.php

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4. Create a simple online game

With the Websocket server, we can implement some simple online game functions.

Create a file called index.html and add the following code:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>在线游戏</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        var conn = new WebSocket('ws://localhost:8080');
        
        conn.onopen = function() {
            conn.send('Hello, Server!');
        };

        conn.onmessage = function(e) {
            console.log('Server: ' + e.data);
        };
        
        function sendMsg() {
            var msg = $('#msg').val();
            if (msg != '') {
                conn.send(msg);
                $('#msg').val('');
            }
        }
    </script>
</head>
<body>
    <input type="text" id="msg" placeholder="请输入消息">
    <button onclick="sendMsg()">发送</button>
</body>
</html>

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Open index.html in your browser, enter a message and Click the Send button to send the message to the Websocket server.
In the code of the Websocket server, corresponding processing can be performed based on the received message to implement game logic.

The above is the basic tutorial on using PHP to develop Websocket and implement online game functions. By learning and mastering this knowledge, we can develop more complex and rich applications. I hope this article can be helpful to everyone!

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