где тут ошибка ругаеться на 8 и 12 строку парметром in good

<?
require_once ('../includes/start.php');
require_once ('../includes/functions.php');
require_once ('../includes/header.php');
include_once ('../themes/header.php');
echo '<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>';

if(!$_SESSION['good']) echo '<div class="success">'.$_SESSION['good'].'</div>'; $_SESSION['good'] = '';


echo '<link rel="stylesheet" href="style.css" type="text/css" /><div class="title">RbPayCoins</div>';
if($_SESSION['error']) echo '<div class="err">'.$_SESSION['error'].'</div>'; $_SESSION['error'] = '';


if(isset($_REQUEST['transfer'])) {

$summa = $_POST['summa'];
$us = $_POST['us'];

?

Когда такое заклчаете в if используйте isset