get_page_children( int $page_id, WP_Post[] $pages ): WP_Post[]

Identifies descendants of a given page ID in a list of page objects.


Descendants are identified from the $pages array passed to the function. No database queries are performed.


Page ID.
List of page objects from which descendants should be identified.


WP_Post[] List of page children.

More Information

This function calls itself recursively.


function get_page_children( $page_id, $pages ) {
	// Build a hash of ID -> children.
	$children = array();
	foreach ( (array) $pages as $page ) {
		$children[ (int) $page->post_parent ][] = $page;

	$page_list = array();

	// Start the search by looking at immediate children.
	if ( isset( $children[ $page_id ] ) ) {
		// Always start at the end of the stack in order to preserve original `$pages` order.
		$to_look = array_reverse( $children[ $page_id ] );

		while ( $to_look ) {
			$p           = array_pop( $to_look );
			$page_list[] = $p;
			if ( isset( $children[ $p->ID ] ) ) {
				foreach ( array_reverse( $children[ $p->ID ] ) as $child ) {
					// Append to the `$to_look` stack to descend the tree.
					$to_look[] = $child;

	return $page_list;



User Contributed Notes

  1. Skip to note 3 content


    // Set up the objects needed
    $my_wp_query = new WP_Query();
    $all_wp_pages = $my_wp_query->query(array('post_type' => 'page'));
    // Get the page as an Object
    $portfolio =  get_page_by_title('Portfolio');
    // Filter through all pages and find Portfolio's children
    $portfolio_children = get_page_children( $portfolio->ID, $all_wp_pages );
    // echo what we get back from WP to the browser
    echo '<pre>' . print_r( $portfolio_children, true ) . '</pre>';
  2. Skip to note 4 content

    In one of my Hierarchical Custom Post Type (locations) I did @bhlarsen’s method, and in some extent it’s returning false children. So I did it my way:

    //Instead of calling and passing query parameter differently, we're doing it exclusively
    $all_locations = get_pages( array(
                            'post_type'         =&gt; 'locations', //here's my CPT
                            'post_status'       =&gt; array( 'publish', 'pending' ) //my custom choice
                        ) );
    //Using the function
    $inherited_locations = get_page_children( $location_parent_id, $all_locations );
    // echo what we get back from WP to the browser (@bhlarsen's part :) )
    echo '' . print_r( $inherited_locations, true ) . '';

    It’s giving me the correct children.

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