PHP と DataTables を使用してページ分割されたデータ テーブルを作成する

CREATE TABLE users (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(30) NOT NULL,
    age INT(3) NOT NULL,
    email VARCHAR(50),
    registration_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

<?php
header('Content-Type: application/json');

$servername = "localhost"; // 数据库服务器名
$username = "username"; // 数据库用户名
$password = "password"; // 数据库密码
$dbname = "myDB"; // 数据库名

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 查询数据总数
$sql = "SELECT COUNT(*) FROM users";
$result = $conn->query($sql);
$row = $result->fetch_row();
$total_count = $row[0];

// 分页参数
$limit = $_GET["length"];
$offset = $_GET["start"];

// 查询当前页数据
$sql = "SELECT id, name, age, email, registration_date FROM users LIMIT $offset, $limit";
$result = $conn->query($sql);

// 构造JSON数据
$data = [];
while($row = $result->fetch_assoc()) {
    $data[] = $row;
}
echo json_encode(array(
    "draw" => $_GET["draw"], 
    "recordsTotal" => $total_count, 
    "recordsFiltered" => $total_count, 
    "data" => $data
));

$conn->close();
?>

<!-- 引入 jQuery -->
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>

<!-- 引入 DataTables -->
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css">
<script type="text/javascript" src="https://cdn.datatables.net/1.10.20/js/jquery.dataTables.min.js"></script>

// 初始化 DataTables
$(document).ready(function() {
    $('#example').DataTable({
        "processing": true,
        "serverSide": true,
        "ajax": "data.php"
    });
});