get_page_hierarchy( WP_Post[] $pages, int $page_id )

Order the pages with children under parents in a flat list.


Description Description

It uses auxiliary structure to hold parent-children relationships and runs in O(N) complexity


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Parameters Parameters

$pages

(WP_Post[]) (Required) Posts array (passed by reference).

$page_id

(int) (Optional) Parent page ID. Default 0.


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Return Return

(string[]) Array of post names keyed by ID and arranged by hierarchy. Children immediately follow their parents.


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Source Source

File: wp-includes/post.php

function get_page_hierarchy( &$pages, $page_id = 0 ) {
	if ( empty( $pages ) ) {
		return array();
	}

	$children = array();
	foreach ( (array) $pages as $p ) {
		$parent_id                = intval( $p->post_parent );
		$children[ $parent_id ][] = $p;
	}

	$result = array();
	_page_traverse_name( $page_id, $children, $result );

	return $result;
}


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Changelog Changelog

Changelog
Version Description
2.0.0 Introduced.

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