$cart = cart_get_items();
break;
case 'add':
$product_id = $_GET['product_id'];
$quantity = $_GET['quantity'];
$product = get_product($product_id);
// validate the quantity entry
if (empty($quantity)) {
display_error('You must enter a quantity.');
} elseif (!is_valid_number($quantity, 1)) {
display_error('Quantity must be 1 or more.');
}
cart_add_item($product_id, $quantity);
$cart = cart_get_items();
break;
case 'update':
$items = $_POST['items'];
foreach ($items as $product_id => $quantity) {
if ($quantity == 0) {
cart_remove_item($product_id);
} else {
cart_update_item($product_id, $quantity);
}
}
$cart = cart_get_items();
break;
default:
add_error("Unknown cart action: " . $action);
break;
}
include './cart_view.php';
<tr id="cart_header">
<th class="left">Item</th>
<th class="right">Price</th>
<th class="right">Quantity</th>
<th class="right">Total</th>
</tr>
<?php
foreach ($cart as $product_id => $item) {
?>
<?php
$error = false;
$product = get_product($product_id);
$available_stock = $product['qtyOnHand'] - $product['pending'];
if ($item['quantity'] > $available_stock) {
$item['quantity'] = $available_stock;
cart_update_item($product_id, $item['quantity']);
$error = true;
}
?>
<tr>
<td><?php
echo $item['name'];
?>
<?php
if ($error) {
?>
<br><span class="error">Quantity exceeds available stock. <b>Quantity adjusted</b>.</span>
<?php
}
?>
</td>