search
HomeBackend DevelopmentPHP TutorialHow to use WebSocket in PHP

With the development of network technology, WebSocket (Web Socket) has become a popular protocol, which can establish a real-time communication channel between the browser and the server to maintain a connection. This protocol plays a huge role in enabling real-time communication capabilities in web applications.

In the field of PHP development, WebSocket is used more and more widely. In this article, we will introduce how to use WebSocket in PHP.

  1. Install WebSocket library

First, we need to use a PHP WebSocket library to easily implement WebSocket functions in PHP. Currently the most popular PHP WebSocket libraries are Ratchet and PHP WebSocket.

Here we use Ratchet, which uses the ReactPHP library to implement asynchronous event-driven PHP, and is perfectly compatible with other frameworks and has flexibility and scalability.

Before we start, we need to install Composer first, because Ratchet is installed and managed using Composer.

Composer can be downloaded here: https://getcomposer.org/

Install Ratchet using Composer:

composer require cboden/ratchet
  1. Write a PHP WebSocket server

In this example, we are going to implement a simple chat room and use Ratchet to write a WebSocket server. The following are the steps to implement:

a. Create a WebSocket server

use RatchetServerIoServer;
use RatchetHttpHttpServer;
use RatchetWebSocketWsServer;

require dirname(__DIR__) . '/vendor/autoload.php';

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

$server->run();

Here, the Ratchet library is first introduced, and then a WebSocket server is created. HttpServer and WsServer are used to specify HTTP and WebSocket protocol support respectively. and pass them to the Chat class (it will be shown later that the Chat class is used to handle client connection requests).

Here we listen to port 8080.

b. Create a chat room

use RatchetMessageComponentInterface;
use RatchetConnectionInterface;

class Chat implements MessageComponentInterface
{
    public $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();
    }
}

Here, we created a class named Chat, which implements the MessageComponentInterface interface. This interface defines the operations performed by the WebSocket server in different connection states.

Specifically, we declared a clients variable in the constructor, which is the SplObjectStorage object that stores the connected client. In the onOpen method, the connection object is assigned to this variable.

When there is a message from any client, we broadcast the message through the onMessage method, which will be received for each connection.

In the onClose method, the connection object will be removed from the variable. If an error occurs and the client connection cannot be handled, then our onError function will be called.

  1. Write client-side JavaScript code

Next, we need client-side JavaScript code to connect to the WebSocket server.

let socket = new WebSocket('ws://localhost:8080');
socket.onopen = function(event) {
  console.log('WebSocket连接已建立');
};

socket.onmessage = function(event) {
  console.log('收到消息:' + event.data);
};

Here we directly use the API of the WebSocket object to connect and send and receive messages to the server.

  1. Run the WebSocket Server

When you complete the above steps, you have successfully written a WebSocket server. Now run your server, either via the command line:

php server.php

When starting the server from the command line, you should see results similar to the following:

2019-03-22 11:46:55 WebSocketServer: Listening on 0.0.0.0:8080
2019-03-22 11:52:50 WebSocketServer: Opened connection to http://localhost:54616

indicates that the WebSocket service has started successfully And listen on port 8080.

  1. Test the WebSocket connection

Finally, open the browser and visit http://localhost/chat.html. You can see that the browser connects and joins the WebSocket server.

let socket = new WebSocket('ws://localhost:8080');
socket.onopen = function(event) {
  console.log('WebSocket连接已建立');
  socket.send('欢迎加入聊天室');
};

socket.onmessage = function(event) {
  console.log('收到消息:' + event.data);
};

Here, we send the message to the server and log it in the console when the server message is received.

When running the test web page, you will see output similar to the following on the console:

WebSocket已连接
WebSocket收到消息:欢迎加入聊天室

Now, you have successfully used WebSocket in PHP and created a simple chat room. Hope this tutorial can be helpful to you.

The above is the detailed content of How to use WebSocket in PHP. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How do you modify data stored in a PHP session?How do you modify data stored in a PHP session?Apr 27, 2025 am 12:23 AM

TomodifydatainaPHPsession,startthesessionwithsession_start(),thenuse$_SESSIONtoset,modify,orremovevariables.1)Startthesession.2)Setormodifysessionvariablesusing$_SESSION.3)Removevariableswithunset().4)Clearallvariableswithsession_unset().5)Destroythe

Give an example of storing an array in a PHP session.Give an example of storing an array in a PHP session.Apr 27, 2025 am 12:20 AM

Arrays can be stored in PHP sessions. 1. Start the session and use session_start(). 2. Create an array and store it in $_SESSION. 3. Retrieve the array through $_SESSION. 4. Optimize session data to improve performance.

How does garbage collection work for PHP sessions?How does garbage collection work for PHP sessions?Apr 27, 2025 am 12:19 AM

PHP session garbage collection is triggered through a probability mechanism to clean up expired session data. 1) Set the trigger probability and session life cycle in the configuration file; 2) You can use cron tasks to optimize high-load applications; 3) You need to balance the garbage collection frequency and performance to avoid data loss.

How can you trace session activity in PHP?How can you trace session activity in PHP?Apr 27, 2025 am 12:10 AM

Tracking user session activities in PHP is implemented through session management. 1) Use session_start() to start the session. 2) Store and access data through the $_SESSION array. 3) Call session_destroy() to end the session. Session tracking is used for user behavior analysis, security monitoring, and performance optimization.

How can you use a database to store PHP session data?How can you use a database to store PHP session data?Apr 27, 2025 am 12:02 AM

Using databases to store PHP session data can improve performance and scalability. 1) Configure MySQL to store session data: Set up the session processor in php.ini or PHP code. 2) Implement custom session processor: define open, close, read, write and other functions to interact with the database. 3) Optimization and best practices: Use indexing, caching, data compression and distributed storage to improve performance.

Explain the concept of a PHP session in simple terms.Explain the concept of a PHP session in simple terms.Apr 26, 2025 am 12:09 AM

PHPsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIDstoredinacookie.Here'showtomanagethemeffectively:1)Startasessionwithsession_start()andstoredatain$_SESSION.2)RegeneratethesessionIDafterloginwithsession_regenerate_id(true)topreventsessi

How do you loop through all the values stored in a PHP session?How do you loop through all the values stored in a PHP session?Apr 26, 2025 am 12:06 AM

In PHP, iterating through session data can be achieved through the following steps: 1. Start the session using session_start(). 2. Iterate through foreach loop through all key-value pairs in the $_SESSION array. 3. When processing complex data structures, use is_array() or is_object() functions and use print_r() to output detailed information. 4. When optimizing traversal, paging can be used to avoid processing large amounts of data at one time. This will help you manage and use PHP session data more efficiently in your actual project.

Explain how to use sessions for user authentication.Explain how to use sessions for user authentication.Apr 26, 2025 am 12:04 AM

The session realizes user authentication through the server-side state management mechanism. 1) Session creation and generation of unique IDs, 2) IDs are passed through cookies, 3) Server stores and accesses session data through IDs, 4) User authentication and status management are realized, improving application security and user experience.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool