PHP Websocket Development Guide to realize multi-person online collaboration function-PHP Tutorial-php.cn

PHP Websocket Development Guide to realize multi-person online collaboration function

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Release： 2023-12-17 14:50:01

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PHP Websocket开发指南，实现多人在线协作功能

PHP Websocket Development Guide, to implement multi-person online collaboration function, requires specific code examples

With the development of the Internet, multi-person online collaboration has become a very Common needs. As a full-duplex communication protocol, Websocket can achieve real-time communication and provides a good solution for multi-person online collaboration. This article will introduce how to use PHP to develop Websocket servers and give specific code examples to help readers quickly understand and practice this technology.

1. Introduction to Websocket
Websocket is a TCP-based protocol that can establish a persistent connection between the client and the server to achieve two-way communication. Compared with the traditional HTTP request-response model, Websocket has the following advantages:

Real-time: Websocket can enable the server to actively push messages to the client to achieve real-time communication;
Efficiency High: Compared with other implementation methods such as polling and long polling, Websocket has smaller communication overhead;
supports full-duplex communication: the client and server can send and receive messages at the same time.

2. PHP development of Websocket server
In PHP, you can develop a Websocket server by using the Ratchet library. Ratchet is a PHP Websocket library based on ReactPHP, which provides a convenient and fast development interface.

Install Ratchet library:
Execute the following command in the command line to install Ratchet library:
```
composer require cboden/ratchet
```
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Create server code:
Introduce the Ratchet library into the PHP file and create a class that inherits from MessageComponentInterface to implement onOpen, onMessage, onClose and onError and other methods to handle client connections and message delivery. The following is a simple example:

<?php
require 'vendor/autoload.php';

use RatchetMessageComponentInterface;
use RatchetConnectionInterface;

class Chat implements MessageComponentInterface
{
 protected $clients;

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

 public function onOpen(ConnectionInterface $conn)
 {
     $this->clients->attach($conn);
 }

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

 public function onClose(ConnectionInterface $conn)
 {
     $this->clients->detach($conn);
 }

 public function onError(ConnectionInterface $conn, Exception $e)
 {
     $conn->close();
 }
}

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

$server->run();

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Start the Websocket server:
Execute the following command in the command line to start the Websocket server:
```
php your_server_file.php
```
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3. Use Websocket to realize multi-person online collaboration function
Through the above code example, we have successfully created a Websocket server. In order to realize the multi-person online collaboration function, we can use the Websocket server as a message center to realize the broadcast and forwarding of messages.

The following is a simple example that demonstrates how to implement a multi-person chat room function:

<!DOCTYPE html>
<html>
<head>
    <title>WebSocket Chat</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <input type="text" id="message" placeholder="请输入消息" />
    <button id="send">发送</button>
    <div id="chat"></div>

    <script>
        var conn = new WebSocket('ws://localhost:8080');

        conn.onmessage = function(e) {
            $('#chat').append('<p>' + e.data + '</p>');
        };

        $('#send').click(function() {
            var message = $('#message').val();
            conn.send(message);
            $('#message').val('');
        });
    </script>
</body>
</html>

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Save the above HTML code as a separate HTML file, and then open it in the browser document. Every time a page is opened, it will automatically connect to the Websocket server, and real-time communication can be achieved.

Through the above examples, we can see that by using Websocket and PHP together, we can easily develop the function of multi-person online collaboration. Of course, this is just a simple example. In actual application scenarios, we can also combine other technologies and functions to achieve more complex multi-person online collaboration.

Summary:
This article introduces how to use PHP to develop a Websocket server and how to implement multi-person online collaboration through Websocket. Through specific code examples, readers can quickly understand and master this technology. Of course, Websocket has many other application scenarios, and readers can conduct more in-depth study and practice as needed. I hope this article is helpful to readers, thank you for reading!

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