After login redirect to clicked link in php

My friend asked how to redirect a page after login to the clicked link php.Then i did some research and found some codes for this.

Lets have a look this tutorial.

$_SESSION['redirect_to'] = $_SERVER['REQUEST_URI'];

header("Location: login.php?action=login");

exit();

// On successful login

$redirect = $_SESSION['redirect_to'];

// unset the session var

unset($_SESSION['redirect_to']);

header("Location:$redirect");

exit();

Hope this will help