如何在php中循环访问jquery datatable中的所有记录

<table id="datatable">
    <thead>
        <tr>
            <th>ID</th>
            <th>Name</th>
            <th>Email</th>
        </tr>
    </thead>
    <tbody></tbody>
</table>

<script>
$(document).ready(function() {
    $('#datatable').DataTable({
        "ajax": "get_data.php", // 后端处理数据的PHP文件
        "columns": [
            { "data": "id" },
            { "data": "name" },
            { "data": "email" }
        ]
    });
});
</script>

<?php
// 连接数据库，查询数据记录
$servername = "数据库服务器地址";
$username = "数据库用户名";
$password = "数据库密码";
$dbname = "数据库名";

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

$sql = "SELECT id, name, email FROM your_table";
$result = $conn->query($sql);

// 构建数据数组
$data = array();
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $data[] = $row;
    }
}

// 返回数据给前端
echo json_encode(array("data" => $data));

$conn->close();
?>