A simple PHP-based Calculator Project with user authentication (Login, Signup, Logout) and a modern calculator UI built using HTML, CSS, and JavaScript.
This project is perfect for learning PHP sessions, authentication, and MySQL integration.
- 🔑 User Registration (Sign Up)
- 🔓 User Login & Logout
- 📂 Session-based Authentication
- 🖩 Smart Calculator (Add, Subtract, Multiply, Divide, Decimal support)
- 🎨 Beautiful UI with CSS styling
- ⚡ Fast JavaScript-based calculator logic
php-calculator/ │ ├── db.php # Database connection file ├── index.php # Login page ├── register.php # Signup page ├── logout.php # Logout page ├── calculator.php # Calculator (accessible only after login) ├── calculator_db.sql # SQL file to create database & users table ├── style.css # Stylesheet for UI └── script.js # Calculator JavaScript logic
🛠️ Simple Steps to Run
1.Start XAMPP → turn on Apache + MySQL.
2.Copy project folder → put it inside:
3.C:/xampp/htdocs/
4.Create Database
- Open http://localhost/phpmyadmin
- Create a database → name it calculator_db.
- Import the file calculator_db.sql (from your project folder).
5.Run in Browser
- http://localhost/php-calculator-auth(Project Folder Name)