Learn how to use sessions in PHP to create a simple login that remembers a user. For this assignment you should make a login form containing a username field and a password field. The form should use the POST method (rather than GET) to send the information to a PHP document that compares the username to the stored username and the password to the salted and hashed password. Include the following 3 lines as the first three lines of the php file: DEFINE("USR", "jack"); DEFINE ("SALT", "4;lkasdf1"); DEFINE ("PASSWD", sha1 ("54321").SALT); (Learn about define here) Use these lines to define the username, salt and password that you will compare with