simple one page php script

<div id="product-grid">
	<div class="txt-heading">Choose your products</div>
	<div class="product-item">
		<div class="product-image">
			<img src="data/camera.jpg" id="<?php echo "3DcAM01";?>"
				class="product-img">
		</div>
		<div>
			<strong><?php echo "FinePix Pro2 3D Camera";?></strong>
		</div>
		<div class="product-price"><?php echo "1500.00";?></div>

		<input type="button" id="add_<?php echo "3DcAM01";?>"
			value="Add to cart" class="btnAddAction"
			onClick="cartAction('add', '<?php echo "3DcAM01";?>','<?php echo "FinePix Pro2 3D Camera";?>','<?php echo "1500.00";?>')" />

	</div>
	<div class="product-item">
		<div class="product-image">
			<img src="data/watch.jpg" id="<?php echo "wristWear03";?>"
				class="product-img">
		</div>
		<div>
			<strong><?php echo "Luxury Ultra thin Wrist Watch";?></strong>
		</div>
		<div class="product-price"><?php echo "300.00";?></div>

		<input type="button" id="add_<?php echo "wristWear03";?>"
			value="Add to cart" class="btnAddAction"
			onClick="cartAction('add', '<?php echo "wristWear03";?>','<?php echo "Luxury Ultra thin Wrist Watch";?>','<?php echo "300.00";?>')" />
	</div>
	<div class="product-item">
		<div class="product-image">
			<img src="data/laptop.jpg" id="<?php echo "LPN45";?>"
				class="product-img">
		</div>
		<div>
			<strong><?php echo "XP 1155 Intel Core Laptop";?></strong>
		</div>
		<div class="product-price"><?php echo "800.00";?></div>

		<input type="button" id="add_<?php echo "LPN45";?>"
			value="Add to cart" class="btnAddAction"
			onClick="cartAction('add', '<?php echo "LPN45";?>','<?php echo "XP 1155 Intel Core Laptop";?>','<?php echo "800.00";?>')" />
	</div>
</div>

<?php
use Phppot\Cart;
require_once __DIR__ . './../Model/Cart.php';
$cartModel = new Cart();
?>
<input type="hidden" id="cart-item-count"
	value="<?php echo $cartModel->cartSessionItemCount; ?>">
<?php
if ($cartModel->cartSessionItemCount > 0) {
    ?>
<table width="100%" id="cart-table" cellpadding="10" cellspacing="1"
	border="0">
	<tbody>
		<tr>
			<th>Name</th>
			<th>Quantity</th>
			<th class="text-right">Price</th>
			<th class="text-right">Action</th>
		</tr>   
<?php
    $item_total = 0;
    $i = 1;
    foreach ($_SESSION["cart_item"] as $item) {
        ?>
        <tr>
			<td><?php echo $item["name"]; ?></td>
			<td><input type="number" name="quantity" class="quantity"
				value="<?php echo $item['quantity']; ?>"
				data-code='<?php echo $item["code"]; ?>' size=2
				onChange="updatePrice(this)" /> <input type="hidden" class='total'
				name="total" value="<?php echo $item["price"]; ?>" /></td>
			<td class="prc text-right" id="price" <?php echo $i;?>><?php echo $item["price"]; ?></td>
        <?php $i++; ?>
        <td class="text-right"><a
				onClick="cartAction('remove','<?php echo $item["code"]; ?>')"
				class="btnRemoveAction"><img src="./view/images/icon-delete.png"
					alt="Remove Item" /></a></td>
		</tr>
    <?php
        $item_total += ($item["price"] * $item['quantity']);
    }
    ?>
        <tr id="tot">
			<td class="text-right" colspan="3"><strong>Total (USD): </strong> <span
				id="total"><?php echo $item_total;?></span></td>
			<td class="text-right"><a id="btnEmpty"
				onClick="cartAction('empty', '');">Empty Cart</a></td>
		</tr>
	</tbody>
</table>
<?php
} else {
    ?>
<div id="empty-cart">Your cart is empty</div>
<?php
}