I want phone pay intent UPI payment gateway source code

Job ID: 36271273

Budget: ₹37,500 – ₹75,000 INR

I'm looking for the source code of a phone pay intent UPI payment gateway. The code should ideally be written in Php, or in Any Demo link is
http://upiapi.in/
If you have ready made product must prefferd just tell about this in your praposal.

Related categories: PHP JavaScript Software Architecture MySQL Payment Processing