Mysql Database Isn't Updating - php

Question

Okay so users on my game have a page. Other users can comment on the page. I made a script to where the user can set it to where people can comment on their wall or if it's disabled. If I manually change the database it works, but I have it setup with radio buttons and it's not updating. Here's the form.
<form action="settings" method="post">
Comments: <br />
Enabled:
<input type="radio" name="change_wall" id="change_wall" value="no" checked="checked" />
<br />
Disabled:
<input type="radio" name="change_wall" id="change_wall" value="yes" />
<br />
<input type="submit" value="Change" />
</form>
Below this is the SQL of the database updating.
<?php
if ( isset ( $_POST['change_wall'] ) )
{
$change_wall = mysql_real_escape_string($_POST['change_wall']);
if ($cash >= 5000) {
$sql = "UPDATE users SET disable_wall='".$change_wall."' , cash=(cash - 5000) WHERE id='".$id."'";
$res = mysql_query($sql);
echo
'<table width="800" align="center" class="SettingsTable">
<tr>
<td>You sucessfully changed your comment settings!</td>
</tr>
</table>
<br />';
}
else {
echo
'<table width="800" align="center" class="SettingsTable">
<tr>
<td>You don\'t have enough cash to change your comment settings!</td>
</tr>
</table>
<br />';
}
}
?>
Here's the coding for the user's page to display their comments or if it's disabled.
<?php
if ($disable_wall = 0) {
include 'users_wall.php';
}
elseif ($disable_wall = 1) {
echo
'<table width="800" align="center" class="DisabledWall">
<tr>
<td>' . $userp['name'] . '\'s ' . 'Comments Disabled!</td>
</tr>
</table>';
}
?>

Answer 1

first of all, be sure that the sql query is executed - $cash is really >= 5000 and $id variable consists proper value
then, what type does the table field 'disable_wall' have? varchar or enum? not int?
if instructions above didnt help, type this after last line of your script:
die("error: ".mysql_error());
submit the form and watch, what error happened while you are updating the table

Answer 2

Because you need a boolean (yes/no) response, you can simply set them to 0 or 1, to be safe.
To answer your question, do
$sql = "UPDATE users SET disable_wall='1' , cash=(cash - 5000);
And to disable the wall
$sql = "UPDATE users SET disable_wall='0' , cash=(cash - 5000);
Better yet, use a boolean column for it.
Also, ensure that $id is a valid value, and currently has at least a row in the table.
More importantly, use PDO or MySQLi; MySQL extensions are already deprecated.
Hope this helps.