List all children of current item (page, custom post type ...) #WordPress

tp_shortcode_children.php

<?php
/**
*	Shortcode Custom post type children as list
*	Thierry Pigot
*	2015-04-07
*
*	[children id='ID' nb='-1' type='page' depth='1']
**/
function tp_shortcode_children( $atts )
{
	global $post;
	
	extract( shortcode_atts( array(
		'id'		=> $post->ID,
		'nb'		=> -1,
		'type'		=> 'page',
		'depth'		=> '1',
		'orderby'	=> 'title',
		'order'		=> 'ASC',
	), $atts ) );
	
	
	$params = array(
		'post_type'			=> $type,
		'posts_per_page'	=> $nb,
		'post_parent'		=> $id,
		'depth'				=> $depth,
		'orderby'			=> $orderby,
		'order'				=> $order
	);
	$children = query_posts( $params );
	
	if( count( $children ) > 0 )
	{
		$html = '<ul id="tp-'. $type .'-'. $id .'-children" class="tp-'. $type .'-children">';
		foreach( $children as $child )
		{
			$html .= '<li><a href="'. get_page_link( $child->ID ) .'" title="'. $child->post_title .'">'. $child->post_title .'</a></li>';
		}
		$html .= '</ul>';
		
		return $html;
	}
	return false;
}
add_shortcode( 'children', 'tp_shortcode_children' );