wp_get_nav_menu_items how to exclude sub level menu items?

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Think I worked it out!!

I did a print_r on each $menu_item and saw there’s an array key called menu_item_parent in there.

So I changed this:

foreach ( (array) $menu_items as $key => $menu_item ) {
    $title = $menu_item->title;
    $url = $menu_item->url;
    $menu_output .= '<option value="' . $url . '">' . $prefix . $title . '</option>';
}

to this:

foreach ( (array) $menu_items as $key => $menu_item ) {
    if ( $menu_item->menu_item_parent == 0 ) :
        $title = $menu_item->title;
        $url = $menu_item->url;
        $menu_output .= '<option value="' . $url . '">' . $prefix . $title . '</option>';
    endif;
}

Now it will only pull menu items without a menu item parent.

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