Advanced PHP Programming: Design and Implementation of Like Function for Multiple Articles-PHP Tutorial-php.cn

Table of Contents

1. Functional requirements analysis

2. Database design

3. Page design

文章标题2

4. PHP backend implementation

5. Front-end AJAX request

Home

Backend Development

PHP Tutorial

Advanced PHP Programming: Design and Implementation of Like Function for Multiple Articles

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Feb 28, 2024 am 08:03 AM

php Advanced like

Advanced PHP Programming: Design and Implementation of Like Function for Multiple Articles

As a PHP developer, we often encounter the need to add a like function to a website or application. This article will introduce how to design and implement a multi-article like function through advanced PHP programming, and provide specific code examples.

1. Functional requirements analysis

Before designing the function of liking multiple articles, we first need to clarify our functional requirements:

Users can view the functions on the website Post multiple articles and like each article.
Users can only like each article once. When the user has already liked it, he cannot like it again.
Users can check how many people like each article and can cancel likes.

2. Database design

In order to implement the like function, we need to store the user's like information in the database. Next, we design a simple database table to store like information:

CREATE TABLE likes (
    id INT AUTO_INCREMENT PRIMARY KEY,
    article_id INT,
    user_id INT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

Copy after login

In the above table, we store the id, article id, user id and creation time of the like record.

3. Page design

We will create a page containing multiple articles and display a like button under each article. When the user clicks the like button, we will send the like information to the backend through an AJAX request.

The following is a simple page design example:

<!DOCTYPE html>
<html>
<head>
    <title>多篇文章点赞功能</title>
</head>
<body>
    <div>
        <h1 id="文章标题">文章标题1</h1>
        <p>文章内容1</p>
        <button class="like-btn" data-article-id="1">点赞</button>
    </div>
    <div>
        <h1 id="文章标题">文章标题2</h1>
        <p>文章内容2</p>
        <button class="like-btn" data-article-id="2">点赞</button>
    </div>
</body>
</html>

Copy after login

4. PHP backend implementation

In the PHP backend, we will write code to receive AJAX requests and process them The logic of the like function. The following is a simple PHP code example:

<?php
require('db.php'); // 连接数据库
 
if ($_POST['action'] == 'like') {
    $article_id = $_POST['article_id'];
    $user_id = 1; // 假设用户id为1
 
    $sql = "SELECT * FROM likes WHERE article_id = $article_id AND user_id = $user_id";
    $result = mysqli_query($conn, $sql);
 
    if (mysqli_num_rows($result) == 0) {
        $sql = "INSERT INTO likes (article_id, user_id) VALUES ($article_id, $user_id)";
        mysqli_query($conn, $sql);
        echo "点赞成功";
    } else {
        echo "您已经点赞过了";
    }
}
?>

Copy after login

5. Front-end AJAX request

Finally, we need to write front-end JS code to handle the AJAX request sent by clicking the like button. The following is a simple JS code example:

document.querySelectorAll('.like-btn').forEach((btn) => {
    btn.addEventListener('click', function() {
        const articleId = this.getAttribute('data-article-id');
 
        fetch('like.php', {
            method: 'POST',
            body: JSON.stringify({action: 'like', article_id: articleId})
        })
        .then(response => response.text())
        .then(data => {
            alert(data);
        })
        .catch(error => console.error('Error:', error));
    });
});

Copy after login

Through the above steps, we can implement a simple like function for multiple articles. When the user clicks the Like button, the backend will receive an AJAX request, check whether the user has already liked it, and then update the database record.

I hope this article will be helpful to the design and implementation of the like function in advanced PHP programming. This is just a simple example. Practical applications may require more complex logic and optimization, and need to be further improved and expanded by developers.

The above is the detailed content of Advanced PHP Programming: Design and Implementation of Like Function for Multiple Articles. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

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

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 ago By DDD

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

2 weeks ago By DDD

Where to find the Crane Control Keycard in Atomfall

3 weeks ago By DDD

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

1 months ago By DDD

Roblox: Dead Rails - How To Complete Every Challenge

3 weeks ago By DDD

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

Where is the login entrance for gmail email?

7601

CakePHP Tutorial

1386

What is the format of the account name of steam

win11 activation key permanent

nyt connections hints and answers

123

Related knowledge

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

7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

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

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

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.

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.

See all articles