<?php

include 'db.php';

$user_check_query = "SELECT * FROM users";
$result = mysqli_query($db, $user_check_query);
$user = mysqli_fetch_assoc($result);

?>
<table>
    <?php
        while ($row = $result->fetch_assoc()) { ?>
            <tr>
                <td><?php $row['first_name']?></td>
                <td><?php $row['last_name']?></td>
                <td><?php $row['email']?></td>
            </tr>
    <?php } ?>
</table>

//No way sitas veikia :D
 if (count($users) > 0): ?>
     <div class="error">
         <?php foreach ($users as $users) : ?>
             <p><?php echo $users; ?></p>
         <?php endforeach ?>
     </div>
 <?php  endif ?>