My php table changed the false row in my db - php

Question

I'm a PHP beginner & have a question xd
Whenever I click on the submit button, the data of the last user in the PHP table are changed.
Could somebody check on it?
<?php
foreach ($db->results() as $unpaid){
?>
<form method="POST">
<tr><td>
<?=$unpaid->id?>
<input type="hidden" name="user" value="<?=$unpaid->id?>">
</td>
<td><?=$unpaid->username?>
</td>
<td><?=$unpaid->bitcoinadress?></td>
<td><?=$unpaid->points?></td>
<td><?=$unpaid->requestdate?></td>
<td><?=$unpaid->status?></td>
<td>
<input type="submit" class="btn btn-warning" name="submit" value="Submit" /><br/>
</td>
</tr>
<?php } ?>
<?php
if(isset($_POST['submit']))
$id = $POST_['user'];
$db->update("payment_request", $id, ["status"=>"Paid"]);
?>
</form>
</table>

Answer 1

You can't put a <form> around a <tr>. You need to put the form inside one of the <td> tags.
<table>
<?php
foreach ($db->results() as $unpaid){
?>
<tr>
<td> <?=$unpaid->id?> </td>
<td><?=$unpaid->username?> </td>
<td><?=$unpaid->bitcoinadress?></td>
<td><?=$unpaid->points?></td>
<td><?=$unpaid->requestdate?></td>
<td><?=$unpaid->status?></td>
<td>
<form method="POST">
<input type="hidden" name="user" value="<?=$unpaid->id?>">
<input type="submit" class="btn btn-warning" name="submit" value="Submit" /><br/>
</form>
</td>
</tr>
<?php } ?>
<?php
if(isset($_POST['submit']))
$id = $POST_['user'];
$db->update("payment_request", $id, ["status"=>"Paid"]);
?>
</table>