How to use PHP to develop article reading function

How to use PHP to develop article reading function

In today's era of information explosion, reading has become one of the important channels for people to obtain knowledge. In order to allow users to better read articles, record reading progress, and switch articles conveniently, developing an article reading function has become one of the necessary functions for many websites. This article will be based on PHP and introduce how to use PHP to develop a simple article reading function.

1. Create a database

First, we need to create a database to store article information. We can use MySQL or other relational databases to create databases. The following is a simple SQL statement to create an article table:

CREATE TABLE `articles` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` varchar(255) NOT NULL,
  `content` text NOT NULL,
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

2. Write PHP code

Next, we need to write PHP code to implement the article reading function. First, we need to connect to the database. The following is a simple code example for connecting to the database:

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

// 创建数据库连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

Next, we need to write a function to get the article list. The following is a simple function code example to get a list of articles:

function getArticles() {
    global $conn;

    $sql = "SELECT * FROM articles ORDER BY created_at DESC";
    $result = $conn->query($sql);

    $articles = array();
    if ($result->num_rows > 0) {
        while($row = $result->fetch_assoc()) {
            $articles[] = $row;
        }
    }

    return $articles;
}

Then, we need to write a function to get a single article. The following is a simple function code example to obtain a single article:

function getArticle($id) {
    global $conn;

    $sql = "SELECT * FROM articles WHERE id = $id";
    $result = $conn->query($sql);

    if ($result->num_rows > 0) {
        $row = $result->fetch_assoc();
        return $row;
    }

    return null;
}

Finally, we can use these functions in the page to implement the article reading function. The following is a code example for a simple article reading page:

<?php
require_once 'utils.php';

$articles = getArticles();

foreach ($articles as $article) {
    $id = $article['id'];
    $title = $article['title'];

    echo '<h2><a href="article.php?id='.$id.'">'.$title.'</a></h2>';
}

In the article reading page, we can obtain a single article based on the article ID and display it on the page. The following is a code example for a simple article details page:

<?php
require_once 'utils.php';

$id = $_GET['id']; // 获取文章ID
$article = getArticle($id);

if ($article) {
    echo '<h1>'.$article['title'].'</h1>';
    echo '<p>'.$article['content'].'</p>';
} else {
    echo '文章不存在';
}

3. Summary

Through the above steps, we can use PHP to develop a simple article reading function. By connecting to the database, writing database operation functions and page code, a list of articles is displayed on the website, and a single article can be obtained based on the ID. Of course, this is just a simple example and you can extend and optimize it according to your needs. I hope this article will be helpful for you to learn and understand how to use PHP to develop article reading functions.

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