Simple Shopping Cart in PHP with JQuery and Ajax
In this tutorial, I will teach you how to create a shopping cart with jQuery, Ajax, and PHP.
The shopping cart is important when selling a product based on the web because it serves as a basket that you can put many items in it.
As a result, you can order multiple items in one transaction.
Let’s begin:
- Create a database in the MySQL and name it “productdb“.
- Make a query for creating a table in the database that you have created.
CREATE TABLE IF NOT EXISTS `tblproduct` ( `PRODUCTID` int(11) NOT NULL AUTO_INCREMENT, `MODEL` varchar(30) NOT NULL, `BRAND` varchar(30) NOT NULL, `DESCRIPTION` varchar(99) NOT NULL, `PRICE` double NOT NULL, PRIMARY KEY (`PRODUCTID`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=7 ;
- Make a query for inserting data in the table.
INSERT INTO `tblproduct` (`PRODUCTID`, `MODEL`, `BRAND`, `DESCRIPTION`, `PRICE`) VALUES (1, 'HK-LE3212UVP', 'Sharp', 'LCD VIDEO-KARAOKE 32''''', 33298), (2, 'HK-LE1110UVP', 'Sharp', 'LCD VIDEO-KARAOKE 19''''', 22198), (3, '21V-FS720S', 'Sharp', 'Pure Flat TV ', 7190), (4, 'ES-D708', 'Sharp', 'Spin Dryer 7kg ', 4998), (5, 'ES-D958', 'Sharp', 'Spin Dryer 9.5 KG', 5698), (6, 'SJ-DT55AS', 'Sharp', '5.4 CU.FT S/D SEMI AUTO ', 10900);
- Create a connection between MySQL database and PHP script. Name it “config.php“
<?php
$server = 'localhost';
$dbuser = 'root';
$dbpass = '';
$dbname = 'productdb';
$con = mysql_connect($server, $dbuser, $dbpass);
if (isset($con)) {
# code...
$dbSelect = mysql_select_db($dbname);
if (!$dbSelect) {
echo "Problem in selecting database! Please contact administraator";
die(mysql_error());
}
} else {
echo "Problem in database connection! Please contact administraator";
die(mysql_error());
}
?>- Create a landing and name it “index.php“. Then, do the following codes for the design and retrieving data in the database to the page.
<?php
include "config.php";
?>
<html>
<head>
<title>Product</title>
<!-- CSS plugins -->
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
</head>
<body>
<!-- containner -->
<div class="container">
<!-- row -->
<div class="row">
<h1 class="page-header">Product</h1>
<!-- side bar -->
<div class="sidebar col-md-2">
<!-- panel -->
<div class="panel panel-default " style="min-height:400px;">
<!-- ul -->
<ul >
<li class="list-unstyled" ><h4 class="page-header">MENU</h4></li>
<li class="list-unstyled">
<!-- link product -->
<a href="index.php">
Product
</a>
<!-- end link product -->
</li>
<li class="list-unstyled" >
<!-- link cart -->
<a href="cart.php">
Cart
</a>
<!-- end link cart -->
</li>
</ul>
<!-- end ul -->
</div>
<!-- end panel -->
</div>
<!-- end Sidebar -->
<!-- Content -->
<div class="col-md-10">
<table class="table table-hover">
<tr style="background-color:blue;color:white">
<th>Product Id</th>
<th>Model</th>
<th>Brand</th>
<th>Description</th>
<th>Price</th>
<th>Action</th>
</tr>
<tbody>
<?php
$sqlQuery = "SELECT * FROM `tblproduct`";
$result = mysql_query($sqlQuery) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
# code...
echo '<tr>
<td>' . $row['PRODUCTID'] . '</td>
<td>' . $row['MODEL'] . '</td>
<td>' . $row['BRAND'] . '</td>
<td>' . $row['DESCRIPTION'] . '</td>
<td>' . $row['PRICE'] . '</td>
<td><a href="process.php?Id=' . $row['PRODUCTID'] . '&Price=' . $row['PRICE'] . '" class="btn btn-xs btn-primary">Add to cart</a></td>
</tr>';
}
?>
</tbody>
</table>
</div>
<!-- end Content -->
</div>
<!-- end row -->
</div>
<!-- end container -->
</body>
</html>- Create another file and name it “process.php“. Then, do the following codes for adding, updating and removing items in the cart.
<?php
if (!isset($_SESSION['janobecart'])) {
$_SESSION['janobecart'] = '';
}
if (!empty($_SESSION['janobecart'])) {
// count the session array varible
$max = count($_SESSION['janobecart']);
if (!isset($exist)) {
?>
<script type="text/javascript">
/* <!-- Pop-up Message -->*/
alert('Item is already in the cart.')
/*<!-- End pop-up message -->*/
$_SESSION['janobecart'] = array();
$_SESSION['janobecart'][0]['PRODUCTID'] = $pid;
$_SESSION['janobecart'][0]['PRICE'] = $price;
$_SESSION['janobecart'][0]['QUANTITY'] = 1;
}
echo '<script type="text/javascript">
/* <!-- Pop-up Message -->*/
alert("Item has been added in the cart.")
/* <!-- End pop-up message -->*/
unset($_SESSION['tot']);
?>
<script type="text/javascript">
/* <!-- Pop-up Message -->*/
alert('Item has been removed in the cart.')
/* <!-- End pop-up message -->
redirect to main page.*/
window.location='cart.php'
$_SESSION['janobecart'] = array_values($_SESSION['janobecart']);
}
// Update the quantity in the cart
if (isset($_POST['update'])) {
// ' echo "<script>alert('yes')</script>";
$max = count($_SESSION['janobecart']);
for ($i = 0; $i < $max; $i++) {
$pid = $_SESSION['janobecart'][$i]['PRODUCTID'];
// parse the quantity in interger.
$qty=intval(isset($_GET['qty'.$pid]) ? $_GET['qty'.$_POST['pid']] : "");
// selecting the items that are already in the cart
$sql = "SELECT * FROM `tblproduct` WHERE `PRODUCTID` =" . $pid;
$result = mysql_query($sql) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
// checking the quantity of the item.
// It can't be null
if ($qty > 0 && $qty <= 999) {
// calculting the quantity and the price of an item
$price = $row['PRICE'] * $qty;
// updating the items in the cart.
$_SESSION['janobecart'][$i]['QUANTITY'] = $qty;
$_SESSION['janobecart'][$i]['PRICE'] = $price;
}
}
}
}
?>- Create another file for the design of the cart. Name it “cart.php”
<?php
// start the session to fire the session handler
session_start();
// include the configuration
include "config.php";
?>
<!--Design -->
<html>
<head>
<title>Add to cart</title>
</head>
<body id="content">
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<!-- form -->
<form class="form-group" method="POST" action="">
<!-- containner -->
<div class="container">
<!-- row -->
<div class="row">
<h1 class="page-header">Cart</h1>
<!-- side bar -->
<div class="sidebar col-md-2">
<!-- panel -->
<div class="panel panel-default " style="min-height:400px;">
<!-- ul -->
<ul >
<li class="list-unstyled" ><h4 class="page-header">MENU</h4></li>
<li class="list-unstyled">
<!-- link product -->
<a href="index.php">
Product
</a>
<!-- end link product -->
</li>
<li class="list-unstyled" >
<!-- link cart -->
<a href="cart.php">
Cart
</a>
<!-- end link cart -->
</li>
</ul>
<!-- end ul -->
</div>
<!-- end panel -->
</div>
<!-- end Sidebar -->
<!-- Content -->
<div class="col-md-10" >
<table class="table table-bordered" >
<tr style="background-color:blue;color:white">
<th>Product Id</th>
<th>Model</th>
<th>Brand</th>
<th>Description</th>
<th>Price</th>
<th>Quantity</th>
<th>Subtotal</th>
</tr>
<tbody>
<?php
if (isset($_SESSION['janobecart'])) {
$count_cart = count($_SESSION['janobecart']);
for ($i = 0; $i < $count_cart; $i++) {
$proid = $_SESSION['janobecart'][$i]['PRODUCTID'];
$qty = $_SESSION['janobecart'][$i]['QUANTITY'];
$subtot = $_SESSION['janobecart'][$i]['PRICE'];
$sqlQuery = "SELECT * FROM `tblproduct` WHERE PRODUCTID=" . $proid;
$result = mysql_query($sqlQuery) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
# code...
echo '<tr>
<td>' . $row['PRODUCTID'] . '</td>
<td>' . $row['MODEL'] . '</td>
<td>' . $row['BRAND'] . '</td>
<td>' . $row['DESCRIPTION'] . '</td>
<td>' . $row['PRICE'] . '</td>
<td>
<input type="number" autocomplete="off" class="input input-xs" data-id='. $row['PRICE'] .' id=' . $proid . ' name="qty' . $proid . '" value=' . $qty . ' maxlength="3" size="3" />
<a href="process.php?RemoveId=' . $proid . '" class="btn btn-danger btn-xs glyphicon glyphicon-trash" /></a>
</td>
<td>' . $subtot . '</td>
</tr>';
}
// computing the total price of the items in the cart
@$tot += $subtot;
$_SESSION['tot'] = $tot;
}
} else {
}
?>
<tr>
<!-- Displaying the total amount of the items in the cart. -->
<td colspan="6"><h3 align="right">Total</h3></td>
<td>
<h3>
<?php
echo isset($_SESSION['tot']) ? $_SESSION['tot'] : '0.00';
?>
</h3>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end Content -->
</div>
<!-- end row -->
</div>
<!-- end container -->
</form>
<!-- end form -->
</body>
</html>- Finally, create a script for the updating the quantity of an item in the cart.
<script type="text/javascript" src="jquery/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keyup(function(){
var id = this.id;
var qty = document.getElementById(id).value;
$.ajax({
type:"POST",
url: "process.php?qty"+id+"=" + qty,
dataType: "text", //expect html to be returned
data:{update:"qty", pid:id},
success: function(data){
$("#content").load("cart.php");
$(id).focus();
}
});
});
// $("input").change(function(){
// $("#content").load("cart.php");
// })
})
</script>For all students who need a programmer for their thesis system, or anyone who needs source code in any programming language, you can contact us.
Official documentation
Frequently Asked Questions
How does this PHP ecommerce or online shopping system work?
Frontend: product catalog with categories, search, cart (session-based), checkout. Backend: order management, payment gateway integration (PayPal/Stripe), shipping, customer accounts, order history.
What PHP and MySQL versions does this project require?
Most projects in this batch run on PHP 7.4 to PHP 8.2 with MySQL 5.7+ or MariaDB 10+. A few older projects need PHP 5.6 (deprecated, use XAMPP 7.x). To run: install XAMPP / WAMP / Laragon, extract project to htdocs, import the included .sql file via phpMyAdmin, edit the connection file (usually config.php or db_connect.php) with your DB credentials, browse to the project URL in your browser.
How do I set up the database for this PHP project?
Open phpMyAdmin (http://localhost/phpmyadmin/ on XAMPP), create a new empty database with the name specified in the project’s config.php. Click the Import tab, choose the included .sql file, click Go. Then edit config.php (or includes/connection.php) with: ‘localhost’, your MySQL username (usually ‘root’), your MySQL password (usually blank for XAMPP), and the database name.
Can I use this PHP project for a BSIT capstone or thesis?
Yes, but extend it. A bare CRUD app is too narrow for full capstone scope. Add: user roles via session checks, reports/dashboards (Chart.js + AJAX), PDF exports (TCPDF library), email notifications (PHPMailer), real domain extension (analytics, audit log, multi-branch support). Pair with Chapter 1-5 documentation matching your panel’s rubric.
Why am I getting ‘connection error’ or ‘undefined function mysqli_connect’?
Three common PHP issues: (1) Connection error: Apache + MySQL services not running in XAMPP control panel, OR database name in config.php does not match what you created in phpMyAdmin. (2) ‘undefined function mysqli_connect’: MySQL extension not enabled, in php.ini uncomment extension=mysqli (then restart Apache). (3) ‘No such file or directory’: MySQL socket path wrong, use 127.0.0.1 instead of localhost in the connection string.
Where can I find more PHP projects with source code?
Browse the PHP Projects hub for the full library (300+ vanilla PHP systems). For modern PHP MVC alternatives see Laravel Projects (74 systems) or CodeIgniter Projects (32 systems). For BSIT-focused capstone idea lists see 150 Best Capstone Project Ideas.
Hi. Can u show me how to update the quantity?Thank u. 🙂