How to get login information in action.php file.need action.php file

Answer 1

<?php
$user=$_POST['username'];
$pass=$_POST['password'];
?>

I am assuming here that the name of the input field in file that contains html form is 'username' and the field for password has the name 'password'.

Answer 2

<?php $email = $_POST["email"] ?>

assuming that input field on login page has attribute name="email"
and that you have used post method in form