如何使用PHP开发微信小程序的新闻阅读功能？

<?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");
?>

<?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();
?>

// 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,
    })
}

// 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
            // ...
        }
    });
}