How do I pull fields from URL into a Post?

I am using a subscription system that redirects the user to a link similar to this after hitting the ‘submit’ button:

https://www.yourdomain.com/subscribe/subscribe-url/?address=emailhere&name=namehere&code=3

The page that the user lands on is ‘subscribe-url’… how can I modify the html on that page to display the namehere and emailhere fields on the page?

Thanks,
Zach