// VARIABLES I NEED
	$total_price = 0;
	$total_quantity = 0;
	$names = ""; <---- THIS IS WHAT I DON'T KNOW HOW TO DO

	// HOW I LOOP THROUGH THE CURRENT SHOPPING CART
	foreach($_SESSION['shopping_cart'] as $id => $product){
			$product_id = $product['product_id'];
			$total_quantity += $product['quantity'];
			$total_price += $products[$product_id]['price'] * $product['quantity'];
	}