Redirect to previous page after update

I have been trying to find in the forums for a solution on how to redirect to a previous page after the update button has been clicked. For example if I am on page-1.php and click on a record to go to the updatePage-Rec.php...I would like to return to page-1.php and the same if I were on page-2.php.

I tried to follow the following:
Use the server behavior "Set Session Value" on each page that links into the form. Set the same session variable name with the value corresponding to the page name you are on.

But the page does not redirects.

I created a Session Variable on my product-options.php, named previousPG then I set the Session value to
Trigger: any form post
Session name: previousPG
Value: productioptions.php

On my productoptions-edit.php page I set the After Update Go to value to <?php echo $_SESSION['previousPG']; ?>

if you echo the session in the body of the update page, does it show a value?

try adding the following code at line 1 of the update page to force php to look for the session:

<?php @session_start(); ?>

No value is shown.
This is what I have on top of my _PRODUCT_EDIT.php

<?php @session_start(); ?>
<?php require_once('../../Connections/dbConnect.php'); ?>
<?php require_once("../../webassist/file_manipulation/helperphp.php"); ?>
<?php require_once("../../webassist/database_management/wa_appbuilder_php.php"); ?>
<?php
if (!session_id()) session_start();
if($_SERVER["REQUEST_METHOD"] == "POST") {
$_SESSION["previousPG"] = "_PRODUCT_EDIT.php";
}
?>

and this is what I have on top of my _PRODUCT_OPTIONS.php page

<?php @session_start(); ?>
<?php echo $_SESSION['previousPG']; ?>

No value is displayed and the update server behavior does not update the record

I'll need to troubleshoot directly, see the private message section.

You have a few probelms, i fixed then on the products options pages, but the same problems exist on the other set

1) on the PRODUCT-OPTIONS.php page, the trigger for setting session is any form pagst, i changed that to page load:
<?php
if (!session_id()) session_start();
if("" == "") {
$_SESSION["previousPG"] = "PRODUCT-OPTIONS.php";
}
?>

2) the echo of the session should not be in the hwead of the documat, you should add it to the body, otherwise it will cause errors.

3) you have code on the edit page to destroy sessions
<?php
@session_destroy();

@session_regenerate_id();

?>

this means that the sessions no longer exist when the update form is submitted. needs to be removed.

Thank you. You saved me 2 unnecessary pages that I would have to create.

I have at home a MAC with OS Lion and DW CS 6. On my Mac I am able to delete SESSION Variables by clicking on the minus sign in the Binding panels. Also, I am able to set a Session value without any problems. At work I use a Windows 7 Pro with DW CS 6. I was not able to delete a Session variable from the Binding panels. When I try to set a Session value, the following error message appear "You already have a variable named "previousPG". Please enter a unique name." I am sending an image for you to see that I did not have a Session value before I click on the Server Behaviors Panel plus sign -> Webassist -> Cookies -> Set Session Value. Why would this error appear when clearly I there is no php code on the page.

Use your OS File Browser to browse to your site files and delete the _notes folder.