[Marco van Herwaarden]

PHP Code:

$vbulletin->input->clean_array_gpc('r', array(
    'do' => TYPE_NOHTML,
    'myaction' => TYPE_NOHTML
)); 


If you submit it from a form, it is a POST variable, not a REQUEST, so try:

PHP Code:

$vbulletin->input->clean_array_gpc('p', array(
    'do' => TYPE_NOHTML,
    'myaction' => TYPE_NOHTML
));