How to personalize the order form for a product?

Question

PHP

Hello.
There is a one-page site with several products and one feedback form.
Can you tell a beginner how to personalize the order form so that when ordering, I receive a letter and this letter indicates which button the person ordered the product on.
I just don’t know, the programmer explained to me what to write data-title, but I didn’t understand anything how to write it in the form.
The programmer himself has not responded for a week.