How to use PHP to develop the news reading function of WeChat applet?

How to use PHP to develop the news reading function of WeChat applet?

WeChat Mini Program has become a popular choice for mobile application development in recent years. Its lightweight, convenience and openness make it popular among developers. In WeChat mini programs, implementing the news reading function is a common requirement. This article will introduce how to use PHP to develop the news reading function of WeChat applet and provide specific code examples.

1. Preparation

First, make sure you have registered the mini program on the WeChat public platform and obtained the developer ID and key. This information will be used for subsequent development and debugging.

2. Create database

Create a new database in PHPMyAdmin or other database management tools to store news data. Create a table named "news", containing the following fields: id, title, content, release time. Set the publishing time to datetime type.

3. Connect to the database

Use PHP code to connect to the database and set the character set to UTF-8. Here is an example:

<?php
$servername = "your_servername";
$username = "your_username";
$password = "your_password";
$dbname = "your_dbname";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$conn->set_charset("utf8");
?>

Replace "your_servername" with your database server address, "your_username" and "your_password" with your username and password, and "your_dbname" with your database name.

4. Get the news list

Use PHP's mysql_query function to query the database, get the news list and return it to the applet. The following is an example:

<?php
$sql = "SELECT * FROM news ORDER BY 发布时间 DESC";
$result = $conn->query($sql);

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

    echo json_encode($news);
} else {
    echo "暂无新闻";
}

$conn->close();
?>

Convert the query results into an array and use the json_encode function to convert it into JSON format and return it to the applet.

5. Display news details

In the mini program, when the user clicks on the news list, they need to jump to the news details page and display the content. In order to implement this function, we need to add a details page to the mini program, obtain the ID of the clicked news in the click event, and send it to the background to obtain the news details. The following is an example:

// 点击新闻列表项时触发的事件
function viewNews(e) {
    var newsId = e.currentTarget.dataset.id;

    wx.navigateTo({
        url: '/pages/newsDetail/newsDetail?id=' + newsId,
    })
}

In the newsDetail page, send a request to obtain news details and display them on the page. Here is an example:

// 获取新闻详情
function getNewsDetail() {
    wx.request({
        url: 'your_php_file_url?id=' + newsId,
        success: function(res) {
            var newsDetail = res.data;
            // 在页面上显示新闻详情
            // ...
        }
    });
}

Replace "your_php_file_url" with your PHP file path.

Through the above steps, you can use PHP to develop the news reading function of the WeChat applet. I hope this article can help you develop WeChat mini programs.

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