How can I make a form which store data collect from the user?

Question

Because i want to make a form which collect data from the user and it will be awesome...
Please help ...
Given one example also.

Answer 1

<form action="/action_page.php"method="get">
  First name: <input type="text"name="fname"><br>
  Last name: <input type="text"name="lname"><br>
  <input type="submit"value="Submit">
</form>

Answer 2

But this is a way to create only forms but how we get the data that is filled by users