Identifies descendants of a given page ID in a list of page objects.
Description
Descendants are identified from the $pages
array passed to the function. No database queries are performed.
Parameters
$page_id
intrequired- Page ID.
$pages
WP_Post[]required- List of page objects from which descendants should be identified.
Source
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;
}
Changelog
Version | Description |
---|---|
1.5.1 | Introduced. |
Examples
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:It’s giving me the correct children.