ACF Page Ancestor rule

acf_page_ancestor.php

<?php
/**
 * Modified from: https://github.com/zzgael/wordpress-acf-custom-location-rule-descendant-of-page
 */
add_filter('acf/location/rule_types', 'custom_acf_location_rules_types');
function custom_acf_location_rules_types( $choices ) {
    $choices['Page']['page_ancestor'] = 'Page Ancestor';
    return $choices;
}
 
add_filter('acf/location/rule_values/page_ancestor', 'custom_acf_location_rules_values_page_ancestor');
function custom_acf_location_rules_values_page_ancestor( $choices ) {
	// code modified from: plugins/advanced-custom-fields/core/controllers/field_group.php
	$post_type = 'page';
	$posts = get_posts(array(
		'posts_per_page'			=>	-1,
		'post_type'					=> $post_type,
		'orderby'					=> 'menu_order title',
		'order'						=> 'ASC',
		'post_status'				=> 'any',
		'suppress_filters'			=> false,
		'update_post_meta_cache'	=> false,
	));
 
	if( $posts ) {
		// sort into hierachial order!
		if( is_post_type_hierarchical( $post_type ) ) {
			$posts = get_page_children( 0, $posts );
		}
 
		foreach( $posts as $page ) {
			$title = '';
			$ancestors = get_ancestors($page->ID, 'page');
			if($ancestors) {
				foreach($ancestors as $a)
				{
					$title .= '- ';
				}
			}
 
			$title .= apply_filters( 'the_title', $page->post_title, $page->ID );
 
			// status
			if($page->post_status != "publish") {
				$title .= " ($page->post_status)";
			}
			$choices[ $page->ID ] = $title;
		}
	}
  return $choices;
}
 
add_filter('acf/location/rule_match/page_ancestor', 'custom_acf_location_rules_match_page_ancestor', 10, 3);
function custom_acf_location_rules_match_page_ancestor( $match, $rule, $options ) {
	global $post;
	$match = false;
	$selectedPageID = (int) $rule['value'];
 
	$ancestors = get_post_ancestors( $post->ID );
	$match = in_array($selectedPageID, $ancestors);
 
	if($rule['operator'] == "==") {
	  return $match;
	}
	else if ($rule['operator'] == "!=") {
	  return !$match;
	}
}
 
?>