Brainache....Reading class_core.php...lost...

[Cloudrunner]

Might be a simple answer, but I'm all sortsa confused at this point...I use the $_REQUEST['whatever'] for navigation throughout my scripts, with the new $vbulletin->GPC stuff, how EXACTLY does one run the $_REQUEST array through the cleaning and then call / assign the resulting variable? For example,

http://www.whatever.com/index.php?somevariable=somevalue

My old way of doing things was simply

PHP Code:

if (empty($_REQUEST['somevariable'])){
    $_REQUEST['somevariable'] = 'someothervalue';
} 


How would I run this example now with the $vbulletin->GPC?

Thanks in advance for any help that is given!