Form/html/php

Question

How would you have a html file who shows a form with basic user and pass
And the PHP file who fopens and writes to a text file what was written in the form ?

Its a basic concept but I dont get the coding part😅

Answer 1

https://code.sololearn.com/W1cG5JG8VbwN/?ref=app

Answer 2

I haven't tested this cause I made it on my phone but I think this works.