PHP Websocket development tutorial to build real-time weather warning function-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

PHP Websocket development tutorial to build real-time weather warning function

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Dec 02, 2023 am 10:39 AM

phpwebsocketreal time

PHP Websocket开发教程，构建实时天气预警功能

PHP Websocket development tutorial, building real-time weather warning function

Introduction:
With the development of network technology, real-time communication is becoming more and more important. As a two-way communication protocol, Websocket can enable the server to actively push messages to the client, and is widely used in scenarios such as real-time communication and real-time data updates. This article will introduce how to use PHP to develop Websocket, combined with the real-time weather warning function, and use sample code to help readers understand and apply it.

1. Basic knowledge of Websocket
Websocket is a TCP-based protocol. Unlike the traditional HTTP protocol, it supports two-way communication. The advantages of Websocket are:

It can achieve true real-time communication without client polling.
Can transmit smaller data packets between the client and the server to reduce network bandwidth usage.
Support cross-domain communication.

2. Environment setup
Before you start, make sure you have correctly installed and configured the PHP environment. In fact, PHP's support for Websocket is not good, so we need to use third-party libraries to simplify the development process. In this article, we will use Ratchet to implement Websocket functionality.

Install Ratchet
Use Composer to install Ratchet. Execute the following command in the terminal:
```
composer require cboden/ratchet
```

Create Websocket server
Create a file named server.php in the project directory and write the following code:

<?php
 require 'vendor/autoload.php';
 use RatchetMessageComponentInterface;
 use RatchetConnectionInterface;
 use RatchetServerIoServer;
 use RatchetHttpHttpServer;
 use RatchetWebSocketWsServer;
 
 // 创建一个消息组件
 class WeatherAlert implements MessageComponentInterface {
     public function onOpen(ConnectionInterface $conn) {
         // 客户端连接建立时触发
     }
 
     public function onMessage(ConnectionInterface $conn, $msg) {
         // 接收到客户端发送的消息时触发
     }
 
     public function onClose(ConnectionInterface $conn) {
         // 客户端连接关闭时触发
     }
 
     public function onError(ConnectionInterface $conn, Exception $e) {
         // 出错时触发
     }
 }
 
 // 创建服务器
 $server = IoServer::factory(
     new HttpServer(
         new WsServer(
             new WeatherAlert()
         )
     ),
     8080
 );
 
 // 启动服务器
 $server->run();

3. Real-time weather warning function
The server code above has set up the Websocket server. Below we will use a real-time weather warning function to demonstrate how to use Websocket to implement real-time message push.

Introducing the weather forecast API
Add the following code in the server.php file:

// 引入天气预报API
$api = file_get_contents('http://api.weatherapi.com/v1/forecast.json?key=YOUR_API_KEY&q=YOUR_LOCATION&days=1');
$weatherData = json_decode($api);

Extract weather forecast information
In Add the following code to the onOpen method in the WeatherAlert class:

// 提取天气预报信息
$location = $weatherData->location->name;
$condition = $weatherData->current->condition->text;
$temp = $weatherData->current->temp_c;
$msg = "当前{$location}天气：{$condition}，温度：{$temp}℃";

Real-time push weather forecast information
Add the following code to the onOpen method in the WeatherAlert class:
```
// 实时推送天气预报信息
$conn->send($msg);
```

Client receives message
Add the following code in the HTML file of the client to receive the weather forecast information from the server and display it:

<!DOCTYPE html>
<html>
<head>
 <title>实时天气预警</title>
</head>
<body>
 <h1 id="实时天气预警">实时天气预警</h1>
 <div id="weather"></div>

 <script>
     // 创建Websocket连接
     var ws = new WebSocket("ws://localhost:8080/");
     
     // 监听消息接收事件
     ws.onmessage = function(event) {
         var msg = event.data;
         document.getElementById("weather").innerHTML = msg;
     };
 </script>
</body>
</html>

four , Usage and expansion
Through the above steps, we have completed using PHP to develop Websocket and build a real-time weather warning function. You can expand other real-time notification functions based on actual needs, such as real-time stock quotes, real-time news push, etc.

Summary:
This article introduces the code example of using PHP to develop Websocket and combining it with the real-time weather warning function. By studying this article, you can understand the basic principles and usage of Websocket, and develop more real-time notification functions according to your own needs. I hope this article is helpful to you, thank you for reading!

The above is the detailed content of PHP Websocket development tutorial to build real-time weather warning function. 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

The Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

See all articles

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

Assassin's Creed Shadows: Seashell Riddle Solution

3 weeks agoByDDD

What's New in Windows 11 KB5054979 & How to Fix Update Issues

2 weeks agoByDDD

Where to find the Crane Control Keycard in Atomfall

3 weeks agoByDDD

Assassin's Creed Shadows - How To Find The Blacksmith And Unlock Weapon And Armour Customisation

1 months agoByDDD

Roblox: Dead Rails - How To Complete Every Challenge

3 weeks agoByDDD

Hot Tools

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

Hot Topics

Where is the login entrance for gmail email?

7627

CakePHP Tutorial

1389

What is the format of the account name of steam

win11 activation key permanent

nyt connections hints and answers

140