child-page-ids-in-admin.php

function moomin2(){

	$mypost = $post_ID = $p = (int) $_GET['post'];


	//$target_id = wp_get_post_parent_id( get_the_ID() );

	// Lets see if we have child pages to show
	$p_child_args = array(
		'parent' 		=> intval( $mypost ),
		'depth'			=> 1,
		//'sort_order' 	=> 'ASC',
		//'sort_column' 	=> 'menu_order', /* Things seem to go strange on siblings here */
		'post_status' 	=> 'publish',
		'post_type' 	=> 'page'
	);

	$p_children = get_pages( $p_child_args );

	$child_ids = array();

	foreach ( $p_children as $key => $value ) {
		$child_ids[] = $value->ID;
	}


	wfx_debug($child_ids);

}

add_action('edit_page_form','moomin2');