How to use a variable scope properly so I don't have to use "$_GET"

Question

I'm not even sure if 'variable scope' is the right term. I basically have a form submitted that sets variables. I then redirect conditionally based on some of them, then I need to retrieve some of them again. Currently, it works if I pass them as a Query String and receive via $_GET. I'd use $_POST but it's not the very next page.

I've got a Form page, the reloaded form page which forwards to a landing page. On the landing page, its www.domain.com/landingpage?foo=bar. I'd like a better method.

on the form, i've got

if(isset($_POST['foo'])){ $foo = $_POST['foo']; } else { $foo = ''; }

because I need the variables set always, even if there's an error/blank field.

Then I redirect to

http://www.domain.com/landing?foo=bar

and retrieve $_GET['foo'].

On the form page, how do I set the variable for use on the latter PHP pages?

Cookies would only work if the user agent allows them tho, correct? So would a Session Variable be a more 'reliable' way to go about it? — Xhynk
– Xhynk, Commented Aug 22, 2012 at 19:10
Session variables are dependent on cookies (to identify the correct session to use). — Esailija
– Esailija, Commented Aug 22, 2012 at 19:15

Lusitanian · Accepted Answer · 2012-08-22 19:36:35Z

You probably want to utilize PHP sessions [by the way, variable scope isn't the right word]. Call session_start() at the top of each file, and then you can set variables in the $_SESSION superglobal which will persist across pages.

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