twig function to generate absolute URL's

Twig Absolute Url Function

/**
 *  absoluteUrl
 *  twig function to generate absolute URL's
 *  
 *  @param {string} $string fixed slug appended to Url
 *  @param {array} [$params] array with query string params to add to the Url
 * 
 */
$app['twig'] = $app->share($app->extend('twig', function($twig, $app) {
    $twig->addFunction(new \Twig_SimpleFunction('absoluteUrl', function ($string, $params = []) use ($app) {


        $queryParams = $app['request']->query->all();
        $queryParams = array_merge($queryParams, $params);
        $queryString = http_build_query($queryParams);

        if ($queryString) {
            $queryString = '?' . $queryString;
        }

        return
            $app["request"]->getSchemeAndHttpHost() .
            $app["request"]->getBaseURL() .
            $app["request"]->getPathInfo() .
            $string .
            $queryString;
    }));

    return $twig;
}));