WPML Toogle Switch - Flags only, 2 languages

function language_selector_flags(){

    $selector   = NULL;
    $languages  = icl_get_languages('skip_missing=0&orderby=code');
    if(!empty($languages)){
        foreach($languages as $l){
            if($l['active'] == 0){
                $selector .= "<a href='{$l['url']}'>";
                $selector .= "<img src='{$l['country_flag_url']}' height='12' alt='{$l['language_code']}' width='18' />";
                $selector .= "</a>";
            }
        }
    }
    return $selector;
}

echo language_selector_flags();