kandyor,
if (isset($_POST['mem'])) {
// Установка данных COOKIE
$cuid = base64_encode($usr['id']);
$cups = md5($pass);
setcookie("cuid", $cuid, time() + 3600 * 24 * 30);
setcookie("cups", $cups, time() + 3600 * 24 * 30);
}
$_SESSION['uid'] = $usr['id'];
$_SESSION['ups'] = md5(md5($pass));
header('Location: index.php');