51 lines
1.3 KiB
PHP
51 lines
1.3 KiB
PHP
<?php
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// Add an item to the cart
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function add_item($key, $quantity) {
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global $products;
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if ($quantity < 1) return;
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// If item already exists in cart, update quantity
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if (isset($_SESSION['cart12'][$key])) {
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$quantity += $_SESSION['cart12'][$key]['qty'];
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update_item($key, $quantity);
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return;
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}
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// Add item
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$cost = $products[$key]['cost'];
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$total = $cost * $quantity;
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$item = array(
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'name' => $products[$key]['name'],
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'cost' => $cost,
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'qty' => $quantity,
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'total' => $total
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);
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$_SESSION['cart12'][$key] = $item;
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}
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// Update an item in the cart
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function update_item($key, $quantity) {
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global $products;
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$quantity = (int) $quantity;
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if (isset($_SESSION['cart12'][$key])) {
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if ($quantity <= 0) {
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unset($_SESSION['cart12'][$key]);
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} else {
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$_SESSION['cart12'][$key]['qty'] = $quantity;
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$total = $_SESSION['cart12'][$key]['cost'] *
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$_SESSION['cart12'][$key]['qty'];
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$_SESSION['cart12'][$key]['total'] = $total;
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}
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}
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}
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// Get cart subtotal
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function get_subtotal() {
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$subtotal = 0;
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foreach ($_SESSION['cart12'] as $item) {
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$subtotal += $item['total'];
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}
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$subtotal = number_format($subtotal, 2);
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return $subtotal;
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}
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?>
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