Fejl i kode, nogen der kan hjælpe?

Kode 

<?php
function writeShoppingCart() {
	$cart = $_SESSION['cart'];
	if (!$cart) {
		return '<p><font face="Arial,Verdana,times New Roman" color="#FFFFFF" size="-1">0 varer</font></p>';
	} else {
		$items = explode(',',$cart);
		return '<a href="cart.php">Se kurv ('.count($items).')</a>';
	}
}
function showCart() {
	global $db;
	$cart = $_SESSION['cart'];
	if ($cart) {
		$items = explode(',',$cart);
		$contents = array();
		foreach ($items as $item) {
			$contents[$item] = (isset($contents[$item])) ? $contents[$item] + 1 : 1;
		}
		$output[] = '<form action="cart.php?action=update" method="post" id="cart">';
		$output[] = '<table style="font-family:Arial,Verdana,Times New Roman" style="font-size:16px" style="color:#000000">';
		foreach ($contents as $id=>$qty) {
			$sql = "select * from varebeskrivelse, vareoversigt where vareoversigt.id = '.$id'";
			$result = $db->query($sql);
			$row = $result->fetch();
			extract($row);
			$output[] = '<tr>';
			$output[] = '<td><a href="cart.php?action=delete&id='.$id.'" class="r">Remove</a></td>';
			$output[] = '<td><img src="$row[Billede]">'.$row["VareNr"].', '.$row["VareNavn"].', '.$row["Størrelse"].'</td>';
			$output[] = '<td>£'.$row["Pris"].'</td>';
			$output[] = '<td><input type="text" name="qty'.$id.'" value="'.$qty.'" size="3" maxlength="3" /></td>';
			$output[] = '<td>£'.($row["Pris"] * $qty).'</td>';
			$total += $row["Pris"] * $qty;
			$output[] = '</tr>';
				
		}
		$output[] = '</table>';
		$output[] = '<p>Grand total: <strong>£'.$total.'</strong></p>';
		$output[] = '<div><button type="submit">Opdatér kurv</button></div>';
		$output[] = '</form>';
	} else {
		$output[] = '<p>Kurven er tom</p>';
	}
	return join('',$output);
}
?>