Not delete specified content from mysql - php

Question

I've recently made a PHP, that should; if click a link delete a certain row within one of my MYSQL tables.
The script below has everything but the link [href=delete_ac.php?id etc...] leads to the page but when the page activates it echo ERROR instead of deleting the row.
<h1>Members</h1>
<table>
<tr>
<th>ID</th>
<th>Username</th>
<th>E-Mail Address</th>
<th></th>
</tr>
<?php foreach($rows as $row): ?>
<tr>
<td><?php echo $row['id']; ?></td>
<td><?php echo htmlentities($row['username'], ENT_QUOTES, 'UTF-8'); ?></td>
<td><?php echo htmlentities($row['email'], ENT_QUOTES, 'UTF-8'); ?></td>
<td>delete</td>
</tr>
<?php endforeach; ?>
</table>
delete_ac.php
The script below is what should delete it but it isn't
<?php
require("../php/bp-connectionAdmin.php");
$id=$_GET['id'];
$query = "DELETE FROM `users` WHERE `id` = $id";
$result = mysql_query($query);
if ($result) {
echo "Successful";
} else {
echo "ERROR";
}
?>

Answer 1

Is the ID numeric only? Would the addition of quote marks around $id not help?
$query = "DELETE FROM `users` WHERE `id`='$id'";
mysql_query($query);
Not sure...but give it a go!

Answer 2

Put on the line after $query = "DELETE ..
An
echo "DELETE FROM `users` WHERE `id` = $id";
die;
Then you will see what goes wrong.
Personally i would remove the ', assuming that the id=integer, and you will have:
$query = "DELETE FROM users WHERE id=$id";
If not, try that echood query directly in your Database window and you will see what is wrong.
Most probably you should change your line into
$id=intval($_GET['id']);
which is also much more secure!