title: PHP session variables lost after redirect
body: <p>Session variables are lost after using the following code to redirect:</p>
  
  <pre><code>    header('Location: ./protected_page.php');
      exit; //doesn't seem to do anything
  </code></pre>
  
  <p>On protected page I make sure to use <strong>session_start()</strong> before referencing any session variables.</p>
  
  <p>Please help!</p>