Trouble with Login Redirect [$_SESSION['PrevUrl']

Question

I'm using the DW functionality to confirm that a user is logged in before allowing access to a page. Everything works except successfully redirecting to the previous URL. Here's the situation:
User accesses a page with a url such as "addtocookbook.php?recipeid=6".
Since the user is not logged in, they are redirected to"login.php".
After successfully logging in, the user is redirected to "addtocookbook.php" without the "recipe=6".
My login page does attempt to direct the user to the previous url (if it exists). I'm not sure if there is a simple way to make the variable $_SESSION['PrevUrl'], used by DW to redirect,  store the entire url.
Any help is appreciated.
Elie Chocron

Answer 1

The problem lies with some obsolete code in the Restrict access to page server behavior. Fortunately, the fix is quite simple.
The affected section of code is as follows:
if (!((isset($_SESSION['MM_Username'])) && (isAuthorized("",$MM_authorizedUsers, $_SESSION['MM_Username'], $_SESSION['MM_UserGroup'])))) {  
  $MM_qsChar = "?";
  $MM_referrer = $_SERVER['PHP_SELF'];
  if (strpos($MM_restrictGoTo, "?")) $MM_qsChar = "&";
  if (isset($QUERY_STRING) && strlen($QUERY_STRING) > 0)
  $MM_referrer .= "?" . $QUERY_STRING;
  $MM_restrictGoTo = $MM_restrictGoTo. $MM_qsChar . "accesscheck=" . urlencode($MM_referrer);
  header("Location: ". $MM_restrictGoTo);
  exit;
All that is necessary is to replace the three instances of $QUERY_STRING like this:
if (!((isset($_SESSION['MM_Username'])) && (isAuthorized("",$MM_authorizedUsers, $_SESSION['MM_Username'], $_SESSION['MM_UserGroup'])))) {  
  $MM_qsChar = "?";
  $MM_referrer = $_SERVER['PHP_SELF'];
  if (strpos($MM_restrictGoTo, "?")) $MM_qsChar = "&";
  if (isset($_SERVER['QUERY_STRING']) && strlen($_SERVER['QUERY_STRING']) > 0)
  $MM_referrer .= "?" . $_SERVER['QUERY_STRING'];
  $MM_restrictGoTo = $MM_restrictGoTo. $MM_qsChar . "accesscheck=" . urlencode($MM_referrer);
  header("Location: ". $MM_restrictGoTo);
  exit;
The redirect will then work correctly.