In the digital era like today, an e-commerce website or online store must have a shopping cart feature, it can be said that it is a mandatory shopping cart, because this shopping cart feature will make it easier for visitors to make online transactions on an e-commerce website or online store.
TABLE OF CONTENTS :
1. Introduction
2. Create Database and Table in MySQL
3. File structure
4. Create style.css
5. Create a functions.php file
6. Create an index.php file
7. Create a file home.php
8. Create a products.php . file
9. Create a product.php file
10.Create a shopping cart page / cart.php
11.Create a place order page /placeorder.php
12.Cover
1. INTRODUCTION
In this tutorial we will create a shopping cart system with PHP and MySQL. The shopping cart system will allow our website visitors to browse products, add products to cart, and order online of course.
we will use the PDO interface to access our MySQL database with PHP because it will make it easier for us to interact with our database and manipulate our tables.
The shopping cart system that we will create will contain 4 products first to make it easier for us to practice, later when we are advanced we can add more products. These products are basically just used as examples for this tutorial. You can add your own products later.
2. CREATE DATABASE AND TABLE IN MySQL
2.1 Create Database ‘shoppingcart’
we will create 1 database with the name ‘shoppingcart’, go to the http://localhost/phpmyadmin/ page to create the database, to create the database run the following SQL command ‘CREATE DATABASE shoppingcart;’ in the SQL query. like the picture below.
2.2. Create Table ‘products’
After successfully creating the database, we continue to create the table. follow the steps below:
Let’s create a table in MySQL and insert some data, you can add code below to mysql query
CREATE TABLE IF NOT EXISTS `products` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(200) NOT NULL,
`desc` text NOT NULL,
`price` decimal(7,2) NOT NULL,
`rrp` decimal(7,2) NOT NULL DEFAULT '0.00',
`quantity` int(11) NOT NULL,
`img` text NOT NULL,
`date_added` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
INSERT INTO `products` (`id`, `name`, `desc`, `price`, `rrp`, `quantity`, `img`, `date_added`) VALUES
(1, 'Smart Watch', '<p>Unique watch made with stainless steel, ideal for those that prefer interative watches.</p>\r\n<h3>Features</h3>\r\n<ul>\r\n<li>Powered by Android with built-in apps.</li>\r\n<li>Adjustable to fit most.</li>\r\n<li>Long battery life, continuous wear for up to 2 days.</li>\r\n<li>Lightweight design, comfort on your wrist.</li>\r\n</ul>', '29.99', '0.00', 10, 'watch.jpg', '2019-03-13 17:55:22'),
(2, 'Wallet', '', '14.99', '19.99', 34, 'wallet.jpg', '2019-03-13 18:52:49'),
(3, 'Headphones', '', '19.99', '0.00', 23, 'headphones.jpg', '2019-03-13 18:47:56'),
(4, 'Digital Camera', '', '69.99', '0.00', 7, 'camera.jpg', '2019-03-13 17:42:04');In phpmyadmin it will look like this
The SQL statement code above will create a product table with the following columns:
id — Unique ID for the product, we will set it to auto incremented.
name — The name of the product.
desc — Description of the product.
price — the price of the product.
rrp —Retail price, if you want the product to be sold, you place the value higher than the price.
date_added — The date the product was added, we will use this to sort the products.
The SQL statement above will also include 4 product examples that we can use for testing purposes. You can change/remove them later in the tutorial once we have implemented the code.
3. FILE AND FOLDER STRUCTURE
For the file and folder structure in the project we will create as shown below:
4. CREATE A STYLE.CSS FILE
This file is useful to function to set the appearance of each element written in markup language / HTML. Another function of CSS is to separate content from visual appearance on a website.
write the following code and save it with the name style.css
* {
box-sizing: border-box;
font-family: -apple-system, BlinkMacSystemFont, "segoe ui", roboto, oxygen, ubuntu, cantarell, "fira sans", "droid sans", "helvetica neue", Arial, sans-serif;
font-size: 16px;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
html {
height: 100%;
}
body {
position: relative;
min-height: 100%;
color: #555555;
background-color: #FFFFFF;
margin: 0;
padding-bottom: 100px; /* Same height as footer */
}
h1, h2, h3, h4, h5 {
color: #394352;
}
.content-wrapper {
width: 1050px;
margin: 0 auto;
}
header {
border-bottom: 1px solid #EEEEEE;
}
header .content-wrapper {
display: flex;
}
header h1 {
display: flex;
flex-grow: 1;
flex-basis: 0;
font-size: 20px;
margin: 0;
padding: 24px 0;
}
header nav {
display: flex;
flex-grow: 1;
flex-basis: 0;
justify-content: center;
align-items: center;
}
header nav a {
text-decoration: none;
color: #555555;
padding: 10px 10px;
margin: 0 10px;
}
header nav a:hover {
border-bottom: 1px solid #aaa;
}
header .link-icons {
display: flex;
flex-grow: 1;
flex-basis: 0;
justify-content: flex-end;
align-items: center;
position: relative;
}
header .link-icons a {
text-decoration: none;
color: #394352;
padding: 0 10px;
}
header .link-icons a:hover {
color: #4e5c70;
}
header .link-icons a i {
font-size: 18px;
}
header .link-icons a span {
display: inline-block;
text-align: center;
background-color: #63748e;
border-radius: 50%;
color: #FFFFFF;
font-size: 12px;
line-height: 16px;
width: 16px;
height: 16px;
font-weight: bold;
position: absolute;
top: 22px;
right: 0;
}
main .featured {
display: flex;
flex-direction: column;
background-image: url(imgs/featured-image.jpg);
background-repeat: no-repeat;
background-size: cover;
height: 500px;
align-items: center;
justify-content: center;
text-align: center;
}
main .featured h2 {
display: inline-block;
margin: 0;
width: 1050px;
font-family: Rockwell, Courier Bold, Courier, Georgia, Times, Times New Roman, serif;
font-size: 68px;
color: #FFFFFF;
padding-bottom: 10px;
}
main .featured p {
display: inline-block;
margin: 0;
width: 1050px;
font-size: 24px;
color: #FFFFFF;
}
main .recentlyadded h2 {
display: block;
font-weight: normal;
margin: 0;
padding: 40px 0;
font-size: 24px;
text-align: center;
width: 100%;
border-bottom: 1px solid #EEEEEE;
}
main .recentlyadded .products, main .products .products-wrapper {
display: flex;
flex-wrap: wrap;
align-items: center;
justify-content: space-between;
padding: 40px 0 0 0;
}
main .recentlyadded .products .product, main .products .products-wrapper .product {
display: block;
overflow: hidden;
text-decoration: none;
width: 25%;
padding-bottom: 60px;
}
main .recentlyadded .products .product img, main .products .products-wrapper .product img {
transform: scale(1);
transition: transform 1s;
}
main .recentlyadded .products .product .name, main .products .products-wrapper .product .name {
display: block;
color: #555555;
padding: 20px 0 2px 0;
}
main .recentlyadded .products .product .price, main .products .products-wrapper .product .price {
display: block;
color: #999999;
}
main .recentlyadded .products .product .rrp, main .products .products-wrapper .product .rrp {
color: #BBBBBB;
text-decoration: line-through;
}
main .recentlyadded .products .product:hover img, main .products .products-wrapper .product:hover img {
transform: scale(1.05);
transition: transform 1s;
}
main .recentlyadded .products .product:hover .name, main .products .products-wrapper .product:hover .name {
text-decoration: underline;
}
main > .product {
display: flex;
padding: 40px 0;
}
main > .product > div {
padding-left: 15px;
}
main > .product h1 {
font-size: 34px;
font-weight: normal;
margin: 0;
padding: 20px 0 10px 0;
}
main > .product .price {
display: block;
font-size: 22px;
color: #999999;
}
main > .product .rrp {
color: #BBBBBB;
text-decoration: line-through;
font-size: 22px;
padding-left: 5px;
}
main > .product form {
display: flex;
flex-flow: column;
margin: 40px 0;
}
main > .product form input[type="number"] {
width: 400px;
padding: 10px;
margin-bottom: 15px;
border: 1px solid #ccc;
color: #555555;
border-radius: 5px;
}
main > .product form input[type="submit"] {
background: #4e5c70;
border: 0;
color: #FFFFFF;
width: 400px;
padding: 12px 0;
text-transform: uppercase;
font-size: 14px;
font-weight: bold;
border-radius: 5px;
cursor: pointer;
}
main > .product form input[type="submit"]:hover {
background: #434f61;
}
main > .products h1 {
display: block;
font-weight: normal;
margin: 0;
padding: 40px 0;
font-size: 24px;
text-align: center;
width: 100%;
}
main > .products .buttons {
text-align: right;
padding-bottom: 40px;
}
main > .products .buttons a {
display: inline-block;
text-decoration: none;
margin-left: 5px;
padding: 12px 20px;
border: 0;
background: #4e5c70;
color: #FFFFFF;
font-size: 14px;
font-weight: bold;
border-radius: 5px;
}
main > .products .buttons a:hover {
background: #434f61;
}
main .cart h1 {
display: block;
font-weight: normal;
margin: 0;
padding: 40px 0;
font-size: 24px;
text-align: center;
width: 100%;
}
main .cart table {
width: 100%;
}
main .cart table thead td {
padding: 30px 0;
border-bottom: 1px solid #EEEEEE;
}
main .cart table thead td:last-child {
text-align: right;
}
main .cart table tbody td {
padding: 20px 0;
border-bottom: 1px solid #EEEEEE;
}
main .cart table tbody td:last-child {
text-align: right;
}
main .cart table .img {
width: 80px;
}
main .cart table .remove {
color: #777777;
font-size: 12px;
padding-top: 3px;
}
main .cart table .remove:hover {
text-decoration: underline;
}
main .cart table .price {
color: #999999;
}
main .cart table a {
text-decoration: none;
color: #555555;
}
main .cart table input[type="number"] {
width: 68px;
padding: 10px;
border: 1px solid #ccc;
color: #555555;
border-radius: 5px;
}
main .cart .subtotal {
text-align: right;
padding: 40px 0;
}
main .cart .subtotal .text {
padding-right: 40px;
font-size: 18px;
}
main .cart .subtotal .price {
font-size: 18px;
color: #999999;
}
main .cart .buttons {
text-align: right;
padding-bottom: 40px;
}
main .cart .buttons input[type="submit"] {
margin-left: 5px;
padding: 12px 20px;
border: 0;
background: #4e5c70;
color: #FFFFFF;
font-size: 14px;
font-weight: bold;
cursor: pointer;
border-radius: 5px;
}
main .cart .buttons input[type="submit"]:hover {
background: #434f61;
}
main .placeorder h1 {
display: block;
font-weight: normal;
margin: 0;
padding: 40px 0;
font-size: 24px;
text-align: center;
width: 100%;
}
main .placeorder p {
text-align: center;
}
footer {
position: absolute;
bottom: 0;
border-top: 1px solid #EEEEEE;
padding: 20px 0;
width: 100%;
}5. CREATE THE FUNCTIONS.PHP FILE
The functions.php file contains functions to manage the information displayed on our website pages which includes header templates, footer templates, and database connection functions. Here’s the code and save it with the name functions.php
<?php
function pdo_connect_mysql() {
// Update the details below with your MySQL details
$DATABASE_HOST = 'localhost';
$DATABASE_USER = 'root';
$DATABASE_PASS = '';
$DATABASE_NAME = 'shoppingcart';
try {
return new PDO('mysql:host=' . $DATABASE_HOST . ';dbname=' . $DATABASE_NAME . ';charset=utf8', $DATABASE_USER, $DATABASE_PASS);
} catch (PDOException $exception) {
// If there is an error with the connection, stop the script and display the error.
exit('Failed to connect to database!');
}
}
// Template header, feel free to customize this
function template_header($title) {
// Get the amount of items in the shopping cart, this will be displayed in the header.
$num_items_in_cart = isset($_SESSION['cart']) ? count($_SESSION['cart']) : 0;
echo <<<EOT
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>$title</title>
<link href="style.css" rel="stylesheet" type="text/css">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.1/css/all.css">
</head>
<body>
<header>
<div class="content-wrapper">
<h1>Shopping Cart System</h1>
<nav>
<a href="index.php">Home</a>
<a href="index.php?page=products">Products</a>
</nav>
<div class="link-icons">
<a href="index.php?page=cart">
<i class="fas fa-shopping-cart"></i><span>.$num_items_in_cart</span>
</a>
</div>
</div>
</header>
<main>
EOT;
}
// Template footer
function template_footer() {
$year = date('Y');
echo <<<EOT
</main>
<footer>
<div class="content-wrapper">
<p>© $year, Shopping Cart System</p>
</div>
</footer>
<script src="script.js"></script>
</body>
</html>
EOT;
}
?>6. CREATE INDEX.PHP FILE
The index.php file will basically be our main file to access all of our pages. We will use routing and use GET requests to determine which page to display after the visitor’s action.
Here’s the code and save it with the name index.php
<?php
session_start();
// Include functions and connect to the database using PDO MySQL
include 'functions.php';
$pdo = pdo_connect_mysql();
// Page is set to home (home.php) by default, so when the visitor visits that will be the page they see.
$page = isset($_GET['page']) && file_exists($_GET['page'] . '.php') ? $_GET['page'] : 'home';
// Include and show the requested page
include $page . '.php';
?>7. CREATE HOME.PHP FILE
The Home page will be the first page our customers will see. For this page, we can add a featured image and text, along with a list of the 4 products that were recently added.
Here’s the code and save it with the name home.php
<?php
// Get the 4 most recently added products
$stmt = $pdo->prepare('SELECT * FROM products ORDER BY date_added DESC LIMIT 4');
$stmt->execute();
$recently_added_products = $stmt->fetchAll(PDO::FETCH_ASSOC);
?>
<?=template_header('Home')?>
<div class="featured">
<h2>Gadgets</h2>
<p>Essential gadgets for everyday use</p>
</div>
<div class="recentlyadded content-wrapper">
<h2>Recently Added Products</h2>
<div class="products">
<?php foreach ($recently_added_products as $product): ?>
<a href="index.php?page=product&id=<?=$product['id']?>" class="product">
<img src="imgs/<?=$product['img']?>" width="200" height="200" alt="<?=$product['name']?>">
<span class="name"><?=$product['name']?></span>
<span class="price">
$<?=$product['price']?>
<?php if ($product['rrp'] > 0): ?>
<span class="rrp">$<?=$product['rrp']?></span>
<?php endif; ?>
</span>
</a>
<?php endforeach; ?>
</div>
</div>
<?=template_footer()?>8. CREATE THE PRODUCTS.PHP FILE
The product page will be where our customers will go to browse all product tips. We will limit the number of products displayed on each page and add pagination that allows customers to navigate between pages.
Here’s the code and save it with the name products.php
<?php
// The amounts of products to show on each page
$num_products_on_each_page = 4;
// The current page, in the URL this will appear as index.php?page=products&p=1, index.php?page=products&p=2, etc...
$current_page = isset($_GET['p']) && is_numeric($_GET['p']) ? (int)$_GET['p'] : 1;
// Select products ordered by the date added
$stmt = $pdo->prepare('SELECT * FROM products ORDER BY date_added DESC LIMIT ?,?');
// bindValue will allow us to use integer in the SQL statement, we need to use for LIMIT
$stmt->bindValue(1, ($current_page - 1) * $num_products_on_each_page, PDO::PARAM_INT);
$stmt->bindValue(2, $num_products_on_each_page, PDO::PARAM_INT);
$stmt->execute();
// Fetch the products from the database and return the result as an Array
$products = $stmt->fetchAll(PDO::FETCH_ASSOC);
// Get the total number of products
$total_products = $pdo->query('SELECT * FROM products')->rowCount();
?>
<?=template_header('Products')?>
<div class="products content-wrapper">
<h1>Products</h1>
<p><?=$total_products?> Products</p>
<div class="products-wrapper">
<?php foreach ($products as $product): ?>
<a href="index.php?page=product&id=<?=$product['id']?>" class="product">
<img src="imgs/<?=$product['img']?>" width="200" height="200" alt="<?=$product['name']?>">
<span class="name"><?=$product['name']?></span>
<span class="price">
$<?=$product['price']?>
<?php if ($product['rrp'] > 0): ?>
<span class="rrp">$<?=$product['rrp']?></span>
<?php endif; ?>
</span>
</a>
<?php endforeach; ?>
</div>
<div class="buttons">
<?php if ($current_page > 1): ?>
<a href="index.php?page=products&p=<?=$current_page-1?>">Prev</a>
<?php endif; ?>
<?php if ($total_products > ($current_page * $num_products_on_each_page) - $num_products_on_each_page + count($products)): ?>
<a href="index.php?page=products&p=<?=$current_page+1?>">Next</a>
<?php endif; ?>
</div>
</div>
<?=template_footer()?>9. CREATING THE PRODUCT.PHP FILE
The product page will display all the details for that particular product, specified by the GET request ID variable. Customers can see prices, pictures and descriptions. The customer will be able to change the quantity and add to cart with the click of a button.
The code is as follows and save it with the name product.php
<?php
// Check to make sure the id parameter is specified in the URL
if (isset($_GET['id'])) {
// Prepare statement and execute, prevents SQL injection
$stmt = $pdo->prepare('SELECT * FROM products WHERE id = ?');
$stmt->execute([$_GET['id']]);
// Fetch the product from the database and return the result as an Array
$product = $stmt->fetch(PDO::FETCH_ASSOC);
// Check if the product exists (array is not empty)
if (!$product) {
// Simple error to display if the id for the product doesn't exists (array is empty)
exit('Product does not exist!');
}
} else {
// Simple error to display if the id wasn't specified
exit('Product does not exist!');
}
?>
<?=template_header('Product')?>
<div class="product content-wrapper">
<img src="imgs/<?=$product['img']?>" width="500" height="500" alt="<?=$product['name']?>">
<div>
<h1 class="name"><?=$product['name']?></h1>
<span class="price">
$<?=$product['price']?>
<?php if ($product['rrp'] > 0): ?>
<span class="rrp">$<?=$product['rrp']?></span>
<?php endif; ?>
</span>
<form action="index.php?page=cart" method="post">
<input type="number" name="quantity" value="1" min="1" max="<?=$product['quantity']?>" placeholder="Quantity" required>
<input type="hidden" name="product_id" value="<?=$product['id']?>">
<input type="submit" value="Add To Cart">
</form>
<div class="description">
<?=$product['desc']?>
</div>
</div>
</div>
<?=template_footer()?>10. CREATE A SHOPPING CART PAGE / CART.PHP
The shoppingcart page is where customers can see a list of their products added to their shopping cart. They will have the ability to delete products and update their numbers.
the following code save it with the name cart.php
<?php
// If the user clicked the add to cart button on the product page we can check for the form data
if (isset($_POST['product_id'], $_POST['quantity']) && is_numeric($_POST['product_id']) && is_numeric($_POST['quantity'])) {
// Set the post variables so we easily identify them, also make sure they are integer
$product_id = (int)$_POST['product_id'];
$quantity = (int)$_POST['quantity'];
// Prepare the SQL statement, we basically are checking if the product exists in our databaser
$stmt = $pdo->prepare('SELECT * FROM products WHERE id = ?');
$stmt->execute([$_POST['product_id']]);
// Fetch the product from the database and return the result as an Array
$product = $stmt->fetch(PDO::FETCH_ASSOC);
// Check if the product exists (array is not empty)
if ($product && $quantity > 0) {
// Product exists in database, now we can create/update the session variable for the cart
if (isset($_SESSION['cart']) && is_array($_SESSION['cart'])) {
if (array_key_exists($product_id, $_SESSION['cart'])) {
// Product exists in cart so just update the quanity
$_SESSION['cart'][$product_id] += $quantity;
} else {
// Product is not in cart so add it
$_SESSION['cart'][$product_id] = $quantity;
}
} else {
// There are no products in cart, this will add the first product to cart
$_SESSION['cart'] = array($product_id => $quantity);
}
}
// Prevent form resubmission...
header('location: index.php?page=cart');
exit;
}
// Remove product from cart, check for the URL param "remove", this is the product id, make sure it's a number and check if it's in the cart
if (isset($_GET['remove']) && is_numeric($_GET['remove']) && isset($_SESSION['cart']) && isset($_SESSION['cart'][$_GET['remove']])) {
// Remove the product from the shopping cart
unset($_SESSION['cart'][$_GET['remove']]);
}
// Update product quantities in cart if the user clicks the "Update" button on the shopping cart page
if (isset($_POST['update']) && isset($_SESSION['cart'])) {
// Loop through the post data so we can update the quantities for every product in cart
foreach ($_POST as $k => $v) {
if (strpos($k, 'quantity') !== false && is_numeric($v)) {
$id = str_replace('quantity-', '', $k);
$quantity = (int)$v;
// Always do checks and validation
if (is_numeric($id) && isset($_SESSION['cart'][$id]) && $quantity > 0) {
// Update new quantity
$_SESSION['cart'][$id] = $quantity;
}
}
}
// Prevent form resubmission...
header('location: index.php?page=cart');
exit;
}
// Send the user to the place order page if they click the Place Order button, also the cart should not be empty
if (isset($_POST['placeorder']) && isset($_SESSION['cart']) && !empty($_SESSION['cart'])) {
header('Location: index.php?page=placeorder');
exit;
}
// Check the session variable for products in cart
$products_in_cart = isset($_SESSION['cart']) ? $_SESSION['cart'] : array();
$products = array();
$subtotal = 0.00;
// If there are products in cart
if ($products_in_cart) {
// There are products in the cart so we need to select those products from the database
// Products in cart array to question mark string array, we need the SQL statement to include IN (?,?,?,...etc)
$array_to_question_marks = implode(',', array_fill(0, count($products_in_cart), '?'));
$stmt = $pdo->prepare('SELECT * FROM products WHERE id IN (' . $array_to_question_marks . ')');
// We only need the array keys, not the values, the keys are the id's of the products
$stmt->execute(array_keys($products_in_cart));
// Fetch the products from the database and return the result as an Array
$products = $stmt->fetchAll(PDO::FETCH_ASSOC);
// Calculate the subtotal
foreach ($products as $product) {
$subtotal += (float)$product['price'] * (int)$products_in_cart[$product['id']];
}
}
?>
<?=template_header('Cart')?>
<div class="cart content-wrapper">
<h1>Shopping Cart</h1>
<form action="index.php?page=cart" method="post">
<table>
<thead>
<tr>
<td colspan="2">Product</td>
<td>Price</td>
<td>Quantity</td>
<td>Total</td>
</tr>
</thead>
<tbody>
<?php if (empty($products)): ?>
<tr>
<td colspan="5" style="text-align:center;">You have no products added in your Shopping Cart</td>
</tr>
<?php else: ?>
<?php foreach ($products as $product): ?>
<tr>
<td class="img">
<a href="index.php?page=product&id=<?=$product['id']?>">
<img src="imgs/<?=$product['img']?>" width="50" height="50" alt="<?=$product['name']?>">
</a>
</td>
<td>
<a href="index.php?page=product&id=<?=$product['id']?>"><?=$product['name']?></a>
<br>
<a href="index.php?page=cart&remove=<?=$product['id']?>" class="remove">Remove</a>
</td>
<td class="price">$<?=$product['price']?></td>
<td class="quantity">
<input type="number" name="quantity-<?=$product['id']?>" value="<?=$products_in_cart[$product['id']]?>" min="1" max="<?=$product['quantity']?>" placeholder="Quantity" required>
</td>
<td class="price">$<?=$product['price'] * $products_in_cart[$product['id']]?></td>
</tr>
<?php endforeach; ?>
<?php endif; ?>
</tbody>
</table>
<div class="subtotal">
<span class="text">Subtotal</span>
<span class="price">$<?=$subtotal?></span>
</div>
<div class="buttons">
<input type="submit" value="Update" name="update">
<input type="submit" value="Place Order" name="placeorder">
</div>
</form>
</div>
<?=template_footer()?>11. CREATE A PLACE ORDER PAGE / PLACEORDER.PHP
This page is useful for directing consumers if they press the place order button
the following code save it with the name placeorder.php
<?=template_header('Place Order')?>
<div class="placeorder content-wrapper">
<h1>Your Order Has Been Placed</h1>
<p>Thank you for ordering with us, we'll contact you by email with your order details.</p>
</div>
<?=template_footer()?>12. CLOSING
Congratulations! You have successfully created a shopping cart system with PHP and MySQL, this is just a basic SHOPPING CART system on which you are working, therefore I do not recommend continuing production until you have made a reasonable number of changes and additions, you will need to add your own error handling methods payment, and validation.