<?php
    $data = mysqli_fetch_all($result, MYSQLI_ASSOC);
?>

<table id="table">
    <thead>
        <tr>
            <th>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </th>
        </tr>
    </thead>
</table>

<script type="text/javascript">
    $('#table').DataTable({
        data: <?=json_encode($data);?>
    });
</script>