unable to acess $_GET when dynamically loaded

Question

I'm not sure what is the problem here.

I am using a plugin in wordpress that displays a popup for the users to sign up to the mailing list.

In this plugin, I want to be able to add a variable in a hidden field to post along so I can tell if the user has come from a specific affiliate campaign.

In the url I have

http://example.com/?urlref=affname

and in the modal window that pops up I have coded:

<?php if(isset($_GET['urlref'])) { ?>
     // do stuff here
<?php } else { ?>
    <p>No Aff Link</p>
<?php } ?>

and what i am getting returned is No Aff Link

I have tried using

$_REQUEST['urlref']

but that does not work either.

I have added the above code into the site page (not in the popup) and it works. So it's something to do with it being dynamically loaded I think.

Any ideas?

Answer 1

Converting my comment to the answer :

Reason for $_GET['urlref'] not accessible in pop up might be an request which change the URL as well as $_GET. so you will able to access $_GET['urlref'] in Site Page but not in pop up.

So you can change your if condition in popup like below :

$url = $_SERVER['HTTP_REFERER'];
if (strpos($url,'urlref') !== false) {
    echo 'urlref exists.';
} else {
    echo 'No urlref.';
}

Let me know if you have any doubt.