Sent data from client-side HTML to Wordpress server

Question

I'm running a Wordpress server, it has my web site, and I'm making a custom web page using HTML.

Now ... I want to make a selectBox and 'submit' button for the user...
How to get this data from the user/client side to my server so I can do stuff with it?

1- What should I type in HTML/web page?
2- How to do stuff with this data? (I have snippet plug-in installed).

Answer 1

You can create a table in DB and save customer's data each time they click on that submit button and get data from this table on your site. Or you can use filter_hooks to save data.