PHP数组到HTML表的问题

$students = array(
    array("John", "Doe", 20),
    array("Jane", "Smith", 22),
    array("Tom", "Brown", 19)
);

<table>
    <thead>
        <tr>
            <th>First Name</th>
            <th>Last Name</th>
            <th>Age</th>
        </tr>
    </thead>
    <tbody>
        <!-- 表格数据将在这里动态生成 -->
    </tbody>
</table>

<table>
    <!-- 表头略 -->

    <tbody>
        <?php foreach ($students as $student): ?>
            <tr>
                <td><?php echo $student[0]; ?></td>
                <td><?php echo $student[1]; ?></td>
                <td><?php echo $student[2]; ?></td>
            </tr>
        <?php endforeach; ?>
    </tbody>
</table>