A QR Code Attendance System is a web-based application that simplifies the process of recording and managing attendance using QR codes. The system is built using PHP, along with MySQL for the database and typically includes HTML/CSS/JavaScript for the front-end.

 Key Features

• QR Code Generation: Each user (student/employee) is assigned a unique QR code that links to their ID.
• Attendance Scanning: A scanner (usually the camera of a smartphone or a webcam) reads the QR code and records the attendance.
• Real-Time Logging: When a QR is scanned, the system checks the database and marks the user as "Present" for that day/time.
• Admin Panel: Allows the admin to manage users, view attendance reports, and generate QR codes.
• Date & Time Stamps: Attendance records include timestamps to log exactly when the scan occurred.

How It Works

• User Registration: Admin registers users in the system.
• QR Code Assignment: A unique QR code is generated for each user (often using a PHP library like phpqrcode).

Scanning Process:

• The user shows their QR code to the camera.
• The system reads the QR and fetches the user’s data.
• Attendance is recorded in the database with a timestamp.
• View Reports: Admin can filter and export attendance reports by date, user, or status.

 Tech Stack

• Frontend: HTML, CSS, JavaScript (often includes webcam.js or similar library for QR scanning)
• Backend: PHP
• Database: MySQL
• QR Code Generator/Reader: phpqrcode for generating and jsQR, html5-qrcode, or mobile scanner for reading

 Advantages

• Time-saving and paperless
• Reduces chances of proxy attendance
• Easy to generate reports
• Scalable for schools, colleges, offices, or events