How to add “active” class to wp_nav_menu() current menu item (simple way)

Question

I am creating custom Wordpress theme using a starter theme _Underscores. I am also using Bootstrap as a front-end framework.

I would like to modify wp_nav_menu so th

Answer 1

If you want the 'active' in the html:

header with html and php:

         $menu_item ) {
            if ( ! $menu_item->menu_item_parent ) {
                echo "
";
                echo $menu_item->title;
                echo "
";
            }
        }
        ?>

functions.php:

function vince_check_active_menu( $menu_item ) {
    $actual_link = ( isset( $_SERVER['HTTPS'] ) ? "https" : "http" ) . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
    if ( $actual_link == $menu_item->url ) {
        return 'active';
    }
    return '';
}