A PHP QR Code generator and reader with a user-friendly API
chillerlan/php-qrcode is a modern, flexible PHP library for generating QR codes. It supports various customization options such as size, encoding, error correction, and logo embedding. The library is PSR-compliant and built for ease of use in modern PHP projects, making it suitable for generating QR codes in web apps, receipts, and authentication systems.
...There's a section to allow you to create a QR with some cmd code to simplify the unlock and even delete a file. You can keep concatenating with &&. The screenshots section should show you everything you need to start using it.
Crucially, this does not use any webapi calls. It can run offline.
I'm not a coder so this isn't error handled anywhere near as well as it should. Source is in the files section.
Built on QRCoder by Raffael Herrmann, released under MIT license.
https://github.com/codebude/QRCode
QRMAN an open source Url Shortener and QR Code generator with excellent features. Create, Manage, track Qr codes. Excellent statistics for every QR codes.