Roots nice search redirect - fix

gistfile1.txt

function roots_nice_search_redirect() {
    $valued = $_GET["post_type"];
    if(!empty($valued)) { $valued = "?post_type=".$valued; };

    if (is_search() && strpos($_SERVER['REQUEST_URI'], '/wp-admin/') === false && strpos($_SERVER['REQUEST_URI'], '/search/') === false) {
        wp_redirect(home_url('/search/'.str_replace(array(' ','%20'),array('+', '+'),urlencode(get_query_var('s'))).$valued), 301);
    exit();
   }
}

add_action('template_redirect', 'roots_nice_search_redirect');