view_feedback.php

<?php
include 'db.php';
include 'adminheader.php';
$rs = mysqli_query($conn, "SELECT * FROM user_comments");
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">

<head>
</head>
<body>

<div style="margin-left: 200px;">
<div id="ufeedback">
USER FEEDBACK</div>
<div id="feedbackform">
<table border=2>
<th>S.NO</th>
<th>Name</th>
<th>Email</th>
<th>Comments</th>
<?php
$n = 1;
while ($row = mysqli_fetch_array($rs)) {
    ?>
    <tr>
        <td><?= $n++ ?></td>
        <td><?= $row['name'] ?></td>
        <td><?= $row['email'] ?></td>
        <td><?= $row['comments'] ?></td>
    </tr>
    <?php
}
?>
</table>
</div>
</div>

</body>
</html>