Compass::compassNest PHP Method

    public static function compassNest()
    {
        $args = func_get_args();
        $output = explode(',', array_pop($args));
        for ($i = count($args) - 1; $i >= 0; $i--) {
            $current = explode(',', $args[$i]);
            $size = count($output);
            foreach ($current as $selector) {
                for ($j = 0; $j < $size; $j++) {
                    $output[] = trim($selector) . " " . trim($output[$j]);
                }
            }
            $output = array_slice($output, $size);
        }
        return new SassString(implode(', ', $output));
    }