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copied!<p>You have three general approaches:</p> <ol> <li>Store the previous page in the session;</li> <li>Store the page as a GET variable; or</li> <li>Do an internal redirect to the login page.</li> </ol> <p>(1) looks something like:</p> <pre><code><?php session_start(); if (!$_SESSION['userid']) { $_SESSION['page'] = '/contact'; header('Location: /login'); exit; } ... ?> </code></pre> <p>On successful login retrieve <code>$_SESSION['page']</code> and redirect.</p> <p>(2) is similar except there is no session variable. Instead you have:</p> <pre><code>header('Location: /login?return=/contact'); </code></pre> <p>to pass the redirect. The login page will have to include it as a hidden form field on the page that presents the user with a request for the username and password.</p> <p>(3) is similar but doesn't redirect to a separate page. Instead each page can potentially be a login page. If the user isn't logged in a login form is presented instead. The URL will still be "/contact". Each page will detect and handle log in attempts.</p> <p>The advantage of this method is one less external redirect and it's easier to handle submitted forms. By this I mean that imagine someone fills out a form on one of your pages and then clicks submit. The system sees their login has expired. If you redirect the user to a new page and then redirect back they will probably need to re-enter all the form fields. If you handle the login implicitly you can include all the form fields as hidden inputs and once logged in seamlessly treat it as a submission of the original page.</p>

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