Guys, I'm looking for some help with PHP5.2.x hacking on a web site to cleanup how the user submitted search form is handled. Basically I want to make it simple for the end user to a) refine their query, b) not have to answer popups if they hit the reload button, and c) so I can leanr more PHP. I found this nice reference: http://us2.php.net/manual/en/language.variables.external.php which has two sections by "wayne" and "Jonas Lindel" talking about how you can take the results of a PHP POST request, stuff the vars into your session, and redirect back to the same page without the POST vars set, then complete the query. The idea is so that when people hit the "back" or "reload" buttons, they don't keep getting asked whether they want to resubmit their data. It's not strictly needed, but it would be a nice cleanup of the interface. Here's the snippet I'm trying to use, which bombs out with: Fatal error: Cannot re-assign $this in .... on line 45 And the code I'm using is: <? // We want to put the search query into a session so we can restore it // easily when users goto look at full_holdings.php and then return to // the overall display page. We'll need to do a session_destroy in // index.php I think. See the tutorial(s) at // http://www.phpf1.com/tutorial/php-sessions.html // http://us3.php.net/manual/en/book.session.php session_start(); // Now see Jonas Lindel's & Wayne's code at // http://us2.php.net/manual/en/language.variables.external.php for // this *nice* trick. //is there POST or GET data we should look at if($_POST or ($_GET and (!isset($_SESSION['skipnextget'])))) { //is there GET data? if($_GET) { $newgetarr = array(); foreach($_GET as $key => $value) { if(is_array($value)) { //if it's an array, convert it to comma separated $newvalue = implode(',',$value); } else { $newvalue = $value; } $newgetarr[] = $key.'='.$newvalue; } $newget = implode('&',$newgetarr); $_SESSION['skipnextget'] = 1; } foreach($_POST as $key => $value) { $this[$key] = $value; } $_SESSION['postvars'] = serialize($this); //put POST in the session header("Location: http://" .$_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'] . '?\ ' . $newget); //reload page without POST data and shorter GET data exit(); } else { //after reloading we'll come right to this spot session_unregister('skipnextget'); if(isset($_SESSION['postvars'])) { //load the POST variables from the session // Error on this line below! $this = unserialize($_SESSION['postvars']); session_unregister('postvars'); //delete the session stuff we //don't need anymore. return $this; } }