How to edit articles in php

This article will introduce the steps and precautions for using PHP to implement the article editing function on a web page.

1. Preparation

Before you start to implement the article editing function, you need to ensure that the PHP environment and MySql database have been installed locally or on the server. In addition, there needs to be an HTML page for displaying article content and editing articles.

2. Connect to the database

First you need to connect to the database in the PHP code, which can be achieved through the following code:

$link = mysqli_connect("localhost", "username", "password", "databasename");
if (!$link) {
    die('连接数据库失败: ' . mysqli_error());
}

Among them, "localhost" is the database address, "username " and "password" are the username and password of the database, and "databasename" is the name of the database to be connected.

3. Obtain the article to be edited

To obtain the article to be edited, you need to execute the SQL query statement in the PHP code:

$id = $_GET['id']; //获取文章ID
$sql = "SELECT * FROM articles WHERE id = '$id'";
$result = mysqli_query($link, $sql);
$row = mysqli_fetch_assoc($result);

Among them, $_GET['id'] is from Obtain the article ID from the URL parameter, $sql is the SQL query statement, $result is the result set after executing the SQL query, and $row is a row of records in the result set.

4. Build the edit form

Build the edit form through HTML code. HTML code can be generated using the editor. It should be noted that the obtained article content needs to be filled into the form in order to display the article information in the form.

5. Processing form submission

After the user clicks the save button, the edited article content needs to be updated to the database. This can be achieved through the following code:

$id = $_POST['id']; //获取文章ID
$title = $_POST['title']; //获取文章标题
$content = $_POST['content']; //获取文章内容
$sql = "UPDATE articles SET title='$title', content='$content' WHERE id='$id'";
if (mysqli_query($link, $sql)) {
    echo "文章已成功更新";
} else {
    echo "文章更新失败: " . mysqli_error($link);
}

Among them, $_POST['id'] gets the article ID from the submitted form, $_POST['title'] and $_POST['content'] get the modifications respectively. After the article title and article content, $sql is the SQL update statement.

6. Summary

The above are the steps and precautions for using PHP to implement the article editing function. It should be noted that in order to avoid security issues such as SQL injection, the data obtained from URL parameters and forms need to be verified and filtered for legality.

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