php - How to implement the QR code shared by WeChat and Alipay

Question

A QR code used in some stores can be scanned and paid by WeChat and Alipay. What is the principle?
Is the QR code a simple web page?
If it is a web page, How can I call two third-party interfaces at the same time?

学习ing · Answer

Please see this:
https://www.zhihu.com/questio...

世界只因有你 · Answer

The QR code is a transit URL

Determine whether WeChat or Alipay is opened and jump to the corresponding website

Can be judged by UA

仅有的幸福 · Answer

You can determine whether it was scanned through WeChat or Alipay, and can you call the corresponding interface?