I am trying to get all the IDs in my navigation and convert it to a string so that I can use it with wp_query to get the pages that are only listed in the nav. The code to get the IDs:

$menu_name = 'primary';

if ( ( $locations = get_nav_menu_locations() ) && isset( $locations[ $menu_name ] )) {
    $menu = wp_get_nav_menu_object( $locations[ $menu_name ] );
    $menu_items = wp_get_nav_menu_items($menu->term_id);

foreach ( $menu_items as $menu_item ) {
    $numbers[] = $menu_item->ID;

$number = implode(',',$numbers);

But it is returning the wrong numbers. When I go to the admin area and hover my mouse over the pages, the number that shows up in the address bar on the bottom of the screen doesn't match. What am I doing wrong?


Menu items are stored in the posts table with a post_type of nav_menu_item. So, what you are returning is the ID of the menu item itself, not what it points to.

The page/post ID that the menu item refers to is stored in the postmeta table, with a post_id that matches the menu item ID and meta_key = _menu_item_object_id. The easiest way to get the meta_value (ie the page being pointed to by the menu item) is to use something like this:

$numbers[] = get_post_meta( $menu_item->ID, '_menu_item_object_id', true );

  • It took me a while to get the code that I posted above to work. I have been trying to add your code in but I have not been able to get it to work. I took out the foreach loop and tried your line above but got nothing. How do I use your example? – Jamie Apr 6 '13 at 19:34
  • @Jamie Just replace your line: $numbers[] = $menu_item->ID; with the one in my answer. – anu Apr 6 '13 at 23:16
  • This works great thank you! – return_false Mar 4 at 21:52

I wouldn't be able to tell you when this change happened but as of WordPress version 5.2.4 you can use object and object_id to retrieve the page ID. Here's how I would do this:

 * The `0` is added as a default case.
 * In case our menu does not contain any pages this
 * will prevent our query from returning all pages
$page_ids           = array( 0 );
$registered_menu    = 'my_registered_menu';
$locations          = get_nav_menu_locations();

if( ! empty( $locations ) && isset( $locations[ $registered_menu ] ) ) {

    $menu = wp_get_nav_menu_object( $locations[ $registered_menu ] );
    $menu_items = wp_get_nav_menu_items( $menu->term_id );

    if( ! empty( $menu_items ) ) {

        foreach( $menu_items as $item ) {

            // Only grab page IDs
            if( 'page' !== $item->object ) {

            $page_ids[] = $item->object_id;




$page_query = new WP_Query( array(
    'post_type'     => 'page',
    'post_status'   => 'publish',
    'no_found_rows' => true,
    'post__in'      => $page_ids,
    'posts_per_page'=> 100, // Large upper limit
) );
  • Interesting. Thank you – Jamie Oct 16 '19 at 1:16

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