"This depends on what you mean by "dynamic QR code". Any code, once made is static, in the sense that its image does not change. But "dynamic" is more about the URL it leads to. The code will lead to the URL you give to the generator. So it's not really about the code, but the URL it leads to, and how your server is set up to respond to a request for that URL."
"The QR code is static. But the thing the QR code links to can be dynamic. For example, a bitly redirect. The QR code may point to bit.ly/not-a-real-bitly-link. That's a static. But if the first day/week/month/etc you tell bitly to point that link at example.com/page-a and the next you tell it to point at example.com/different-page, then your static QR code is "dynamically" ending up at whatever target page you chose this day/week/month/whim."
QR code images are static but can point to URLs that are changed independently. Create or use a short-link or redirect service (Bitly, custom redirect domain) as the QR destination so the underlying target can be updated without changing the image. Generate a unique short URL per payment or use a single short URL that routes on the server to different targets based on parameters, date, or database lookup. Implement server-side routing to resolve short paths to payment-specific pages, expiry rules, and analytics. Consider security, parameter validation, and HTTPS for payment links. Alternatively, generate a new QR per payment if immutable URLs are required.
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