footer.php

<div class="container">
        <h3>Employees personal data</h3>
        <table class="table table-sm table-hover table-dark">
            <thead>
                <tr>
                    <td>id</td>
                    <th>Name</th>
                    <th>createdTime</th>
                    <th>City</th>
                    <th>Email</th>
                    <th>Phone</th>
                    <th>
                </tr>
            </thead>
            <tbody>   
                <?php mostrarDatos(); ?>
            </tbody>
        </table>
    </div>
  <!--SCRIPST-->
  
  <!-- jQuery library -->
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js" 
  integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.5.4/dist/umd/popper.min.js" 
    integrity="sha384-q2kxQ16AaE6UbzuKqyBE9/u/KzioAlnx2maXQHiDX9d4/zp8Ok3f+M7DPm+Ib6IU" crossorigin="anonymous"></script>
</body>
</html>