Use PHP to develop question top and highlight functions in the knowledge Q&A website.

Use PHP to develop the question top and essence functions in the knowledge Q&A website

In the knowledge Q&A website, the top question and essence functions are one of the very important functions. They can help website administrators or advanced users in the community highlight some important and valuable questions and answers, improve user experience and increase the readability of content. In this article, we will develop these two functions using PHP and implement them through sample code.

First, let’s take a look at how to implement the question pin function. When a question is pinned, it appears above other questions, making it easier for users to notice it. A common way to do this is to add a sticky field to the question's database table and set it to a boolean value. When the question is pinned, set this field to true, otherwise set it to false. Next, we can sort the questions according to the value of the pinned field, ranking the pinned questions first.

The following is a simple sample code that shows how to implement the question top function in PHP:

<?php
// 使用 mysqli 连接数据库
$connection = new mysqli("localhost", "username", "password", "database");

// 检查数据库连接是否成功
if ($connection->connect_error) {
    die("数据库连接失败: " . $connection->connect_error);
}

// 获取问题列表，按置顶字段排序
$query = "SELECT * FROM questions ORDER BY is_top DESC, id DESC";
$result = $connection->query($query);

// 输出问题列表
while ($row = $result->fetch_assoc()) {
    echo $row["title"] . "<br>";
}

// 关闭数据库连接
$connection->close();
?>

In the above code, we first create a mysqli connection instance and connect to the database. Then use a SELECT statement to get the list of questions from the questions table and sort them in descending order by the is_top field. Finally, the title of each question is output to the page by looping through the result set.

Next, let’s take a look at how to implement the essential functions. Elite questions are those that are considered particularly valuable and very good. We can add a field to the question table to mark whether the question is the essence. Likewise, when an issue is marked as an Essence, set this field to true, otherwise set it to false. Then, we can query the database to filter out those questions marked as the essence and display them individually.

The following is a simple sample code that shows how to implement the question essence function in PHP:

<?php
// 使用 mysqli 连接数据库
$connection = new mysqli("localhost", "username", "password", "database");

// 检查数据库连接是否成功
if ($connection->connect_error) {
    die("数据库连接失败: " . $connection->connect_error);
}

// 获取精华问题列表
$query = "SELECT * FROM questions WHERE is_essence = true ORDER BY id DESC";
$result = $connection->query($query);

// 输出精华问题列表
while ($row = $result->fetch_assoc()) {
    echo $row["title"] . "<br>";
}

// 关闭数据库连接
$connection->close();
?>

In the above code, we obtain the questions marked as essence from the questions table through the SELECT statement List of questions, sorted by id in descending order. Then, by looping through the result set, the title of each essential question is output to the page.

Through the above sample code, we can realize the top question and essence functions in the knowledge Q&A website. Of course, this is just a simple example. In actual development, more complex functional expansion and optimization can be carried out according to needs. I hope this article will be helpful to the question top and essence functions in the PHP development knowledge Q&A website.

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