add query vars to page num link

query_var.php

<?php
function edg_get_pagenum_link_query_vars($query_vars) {

	$query_vars['test'] = 'asdf';

	return $query_vars;
}

add_filter('get_pagenum_link_query_vars', 'edg_get_pagenum_link_query_vars');

function parse_query($var)
{
	$var  = parse_url($var, PHP_URL_QUERY);
	$var  = html_entity_decode($var);
	$var  = explode('&', $var);
	$arr  = array();

	foreach($var as $val)
	{
		$x = explode('=', $val);
		$arr[$x[0]] = $x[1];
	}

	unset($val, $x, $var);

	return $arr;
 }

function edg_get_pagenum_link($result)
{
	$query_vars = parse_query($result);

	list($result) = explode('?', $result, 2);

	$query_vars = apply_filters('get_pagenum_link_query_vars', $query_vars); 

	if ( count($query_vars) )
	{
		$query_string = '';

		foreach($query_vars as $key => $var) {
			$query_string .= $key.'='.urlencode($var);
		}

		$result .= '?'.$query_string;
	}

	return $result;
}

add_filter('get_pagenum_link', 'edg_get_pagenum_link');