Ciao Emulman

ho apportato la modifica, ma mi da errore, ti digito qui sotto l'intero codice della pagina
transact-user.php così com'è in questo momento :

<?php
require_once 'conn.php';
require_once 'http.php';

if (isset($_REQUEST['action'])) {
switch ($_REQUEST['action']) {
case 'Login':
if (isset($_POST['email'])
and isset($_POST['passwd']))
{
$sql = "SELECT user_id, access_lvl,name " .
"FROM cms_users " .
"WHERE email='" . $_POST['email'] . "' " .
"AND passwd='" . $_POST['passwd'] . "'";
$result = mysql_query($sql, $conn)
or die('Could not look up user information; ' .
mysql_error());

if ($row = mysql_fetch_array($result)) {
session_start();
$_SESSION['user_id'] = $row['user_id'];
$_SESSION['access_lvl'] = $row['access_lvl'];
$_SESSION['name'] = $row['name'];
}
}
redirect('index.php');
break;


case 'Logout':
session_start();
session_unset();
session_destroy();

redirect('index.php');
break;

case 'Create Account':
if (isset($_POST['name'])
and isset($_POST['email'])
and isset($_POST['passwd'])
and isset($_POST['passwd2'])
and $_POST['passwd'] == $_POST['passwd2'])
{
$sql = "INSERT INTO cms_users (email, name, passwd) " .
"VALUES ('" . $_POST['email'] . "','" .
$_POST['name'] . "','" . $_POST['passwd'] . "')";

mysql_query($sql, $conn)
or die('Could not create user account; ' . mysql_error());

session_start();
$_SESSION['user_id'] = mysql_insert_id($conn);
$_SESSION['access_lvl'] = 1;
$_SESSION['name'] = $_POST['name'];
}
redirect('index.php');
break;

case 'Modify Account':
if (isset($_POST['name'])
and isset($_POST['email'])
and isset($_POST['accesslvl'])
and isset($_POST['userid']))
{
$sql = "UPDATE cms_users " .
"SET email='" . $_POST['email'] .
"', name='" . $_POST['name'] .
"', access_lvl=" . $_POST['accesslvl'] . " " .
" WHERE user_id=" . $_POST['userid'];

mysql_query($sql, $conn)
or die('Could not update user account; ' . mysql_error());
}
redirect('admin.php');
break;

case 'Send my reminder!':
if (isset($_POST['email'])) {
$sql = "SELECT passwd FROM cms_users " .
"WHERE email='" . $_POST['email'] . "'";

$result = mysql_query($sql, $conn)
or die('Could not look up password; ' . mysql_error());

if (mysql_num_rows($result)) {
$row = mysql_fetch_array($result);

$subject = 'Comic site password reminder';
$body = "Just a reminder, your password for the " .
"Comic Book Appreciation site is: " .
$row['passwd'] .
"\n\nYou can use this to log in at http://" .
$_SERVER['HTTP_HOST'] .
dirname($_SERVER['PHP_SELF']) . '/';

mail($_POST['email'], $subject, $body)
or die('Could not send reminder email.');
}
}
redirect('login.php');
break;

case 'Change my info':
session_start();

if (isset($_POST['name'])
and isset($_POST['email'])
and isset($_SESSION['user_id']))
{
$sql = "UPDATE cms_users " .
"SET email='" . $_POST['email'] .
"', name='" . $_POST['name'] . "' " .
"WHERE user_id=" . $_SESSION['user_id'];

mysql_query($sql, $conn)
or die('Could not update user account; ' . mysql_error());
}
redirect('cpanel.php');
break;
}
}
?>