Now a days QR code(Quick Response Code) is widely used in recent applications for payment gateway, app download link, business cards, UPI payment, PayTM payment, etc. QR code is a Two Dimensional barcode, first designed on 1994 in Japan. Now a days QR code become popular because it has ability to store huge data and smart phone scans QR code easily.
https://www.studentprojectguide.com/php/php-qr-code-generator/
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