always save the query string at the end of file

full_url_helper.php

/**
 * Return the entire current url including querystring
 *
 * @author Jeroen v.d. Gulik
 */
function full_url()
{
	return current_url() . get_querystring();
}

/**
 * Tries to determine if there is a querystring and returns it
 *
 * @author Jeroen v.d. Gulik
 * @return string
 */
function get_querystring()
{
	// Do we have access to QUERY_STRING?
	if (!empty($_SERVER['QUERY_STRING']))
	{
		$qs = $_SERVER['QUERY_STRING'];
	}
	// Do we have access to REDIRECT_QUERY_STRING?
	elseif (!empty($_SERVER['REDIRECT_QUERY_STRING']))
	{
		$qs = $_SERVER['REDIRECT_QUERY_STRING'];
	}

	if (isset($qs))
	{
		$qs = '?' . htmlentities(urlencode($qs));
	}
	else
	// we give up
	{
		$qs = '';
	}

	return $qs;
}