Backend Development
PHP Tutorial
PHP Websocket development guide to implement real-time traffic information query function
PHP Websocket development guide to implement real-time traffic information query function
PHP Websocket Development Guide to realize real-time traffic information query function
- Preface
Websocket is a technology that realizes two-way communication on the Web. It can update data in real time and is suitable for scenarios that require real-time interaction. This article will introduce how to use PHP to develop a real-time traffic information query function and provide corresponding code examples. - Preparation
Before starting development, you need to prepare the following work: - A host with PHP and Apache servers installed, and basic PHP programming knowledge
- A browser that supports Websocket, such as Chrome, Firefox, etc.
- Install Composer to install related dependent libraries
-
Start development
3.1 Install Websocket dependent libraries
Pass Composer installs the Ratchet library, which is a popular choice for developing Websocket applications in PHP. You can install it by running the following command in the terminal:composer require cboden/ratchet
Copy after login
3.2 Create a Websocket server
In the project root Create a server.php file in the directory and add the following code:
<?php
require 'vendor/autoload.php';
use RatchetServerIoServer;
use RatchetHttpHttpServer;
use RatchetWebSocketWsServer;
$server = IoServer::factory(
new HttpServer(
new WsServer(
new TrafficInfo()
)
),
8080 // 服务器端口号
);
$server->run();This code creates a Websocket server and listens to port 8080. Among them, TrafficInfo is the Websocket application class we will create.
3.3 Create Websocket application class
Create a TrafficInfo.php file in the project root directory and add the following code:
<?php
use RatchetMessageComponentInterface;
use RatchetConnectionInterface;
class TrafficInfo implements MessageComponentInterface
{
private $connections;
public function __construct()
{
$this->connections = new SplObjectStorage();
}
public function onOpen(ConnectionInterface $conn)
{
// 当一个新的连接建立时触发
$this->connections->attach($conn);
}
public function onMessage(ConnectionInterface $from, $msg)
{
// 当接收到客户端发送的消息时触发
// 在这里处理相应的逻辑，并将数据发送给所有连接的客户端
$this->broadcast($msg);
}
public function onClose(ConnectionInterface $conn)
{
// 当一个客户端连接关闭时触发
$this->connections->detach($conn);
}
public function onError(ConnectionInterface $conn, Exception $e)
{
// 当发生错误时触发
$conn->send($e->getMessage());
$conn->close();
}
private function broadcast($msg)
{
foreach ($this->connections as $conn) {
$conn->send($msg);
}
}
}This code defines a TrafficInfo class, and implements the MessageComponentInterface interface. In this class, we override methods such as onOpen, onMessage, onClose, and onError to handle interactions with the client. , and implements a broadcast method for sending data to all connected clients.
- Client code
Create aindex.htmlfile in the project root directory and add the following code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Traffic Info</title>
</head>
<body>
<h1>Traffic Info</h1>
<div id="traffic-info"></div>
<script>
var socket = new WebSocket('ws://localhost:8080');
socket.onmessage = function (event) {
var data = JSON.parse(event.data);
// 处理接收到的实时交通信息
document.getElementById('traffic-info').innerHTML = data.message;
};
socket.onclose = function () {
// 服务器连接关闭时触发
console.log('Connection closed');
};
</script>
</body>
</html>This paragraph The code creates a Websocket connection and listens for messages from the server. When a message is received, the data is parsed into JSON format and real-time traffic information is displayed on the page.
Run the program
Place the above files in the root directory of the Apache server, and use the command line to enter the project root directory, and run the following command to start the Websocket server:php server.php
Copy after login
Open the index.html file in your browser to receive real-time traffic information in real time.
So far, we have completed a real-time traffic information query function developed using PHP, and realized real-time two-way communication between the server and the client through Websocket. You can further develop and optimize according to your own needs.
Summary
This article introduces the process of developing real-time traffic information query function using PHP and provides corresponding code examples. Websocket technology performs well in realizing real-time data updates and interactions, and can meet many real-time communication needs. I hope this article can be helpful to you, thank you for reading!
The above is the detailed content of PHP Websocket development guide to implement real-time traffic information query function. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
