extend wpv-if shortcode

gistfile1.txt

add_filter('wpv-extra-condition-filters', 'wpv_add_time_functions');

function wpv_add_time_functions($value) 
{
	// is_get_param($_GET['parameter']) - returns true if parameter is set 
	if (preg_match('/is_get_param\((.*)\)/',$value,$matches))
			{

					$uriparameter = $matches[1];
					if (isset ($_GET[$uriparameter])) 
						return '1=1';
			} 
	return $value; 
}