In this article, we will discuss the point of sale system in PHP with MySQL database.
What is a Point of Sales Software?
The point-of-sale software is known to have the capability of collecting more information. In doing business, the more information you have about your customers, the better equipped you will be.
This Point of Sale System (POS) using PHP with Source Code is designed to help in the management of your business’ inventory.
Using the Point of Sale Software, it will help you to determine the critical level of stocks. With POS System, you will be able to track products.
Products information like sales. The system assists to generate reports for price adjustment. It helps make the record-keeping and accounting simpler.

What Point of Sales Software can do?
POS System will do:
- manage customer,
- product management,
- details,
- and payments.
A POS system PHP project is for the convenience of both customers and employees. With this Free Point of Sales Software for small business, a small business can efficiently manage the in and out of the product. It provides a retail transaction wherein a customer makes a payment to the cashier in exchange for goods with a printed receipt.
Features of Point of Sale source code:
- Customer Management
- Product Management
- Customer Registration
- Suppliers Management
- Secure login
- Sales Management
- Sales Inventory
- Payments (Cash Basis)
- Product Inventory
Download the full source code of POS system Free source code Below.
You can also check here more another version of POS Software.
Conclusion
I use PHP and MySQLi Database to create this POS system Free source code. Take note: this is only a student project, and you cannot expect a perfect system from this source code.
Frequently Asked Questions
How does this PHP Point of Sale system work?
Cashier UI for adding items to cart, scanning barcodes, applying discounts, accepting cash/card, printing receipts (window.print or TCPDF). Real-time inventory deduction. Daily Z-report.
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.

where is the download link of POS
You can click it here. https://itsourcecode.com/wp-content/uploads/2019/04/inventory.zip
how can i install it on my hosting?
could you send me the database
the login credentials aren’t working i found the sales db
the login credentials are not working
Notice: Undefined index: profit in C:\xampp\htdocs\inventory\main\saveproduct.php on line 11
Fatal error: Uncaught exception ‘PDOException’ with message ‘SQLSTATE[23000]: Integrity constraint violation: 1048 Column ‘profit’ cannot be null’ in C:\xampp\htdocs\inventory\main\saveproduct.php:18 Stack trace: #0 C:\xampp\htdocs\inventory\main\saveproduct.php(18): PDOStatement->execute(Array) #1 {main} thrown in C:\xampp\htdocs\inventory\main\saveproduct.php on line 18
Cannot add and save the produects
it is made of mysql and not mysqli
very nice blog, thanks!!!!!!!!!!!
Please what is the login details
The username and password is in the sql database. You need to import first the sql database in phpmyadmin
Really good information about Simple PHP Projects.
Fatal error: Uncaught Error: Call to undefined function mysql_connect() in C:\xampp\htdocs\inventory\login.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\inventory\login.php on line 12