I have problem coding for SESSION approach using in index.php (login page)&nbsp;<div>to redirect user into&nbsp;</div><div>output.php (Dashboard page) after logging in.</div><div><br></div><div>For example,&nbsp;</div><div>After logging in, User accidentally close browser while in output.php url and forgot output.php url.</div><div>User open up index.php url and it redirect user back to output.php...