function wpb_list_child_pages() {
global $post;
$parent = "";
if ( is_page() && $post->post_parent ) {
$parent = wp_list_pages( \'title_li=&include=\' . $post->post_parent . \'&echo=0\' );
$childpages = wp_list_pages( \'sort_column=menu_order&title_li=&child_of=\' . $post->post_parent . \'&echo=0\' );
} else {
$childpages = wp_list_pages( \'sort_column=menu_order&title_li=&child_of=\' . $post->ID . \'&echo=0\' );
//$parent = $post->post_title;
}
if ( $childpages ) {
$string = \'<ul>\'. $parent . $childpages . \'</ul>\';
}
return $string;
}
add_shortcode( \'wpb_childpages\', \'wpb_list_child_pages\' );
OUTPUT ON TOP LEVEL PAGE
<ul>
<li class="page_item page-item-283">
<a href="http://192.168.8.200/www/parent-page/child-page-1/">Child Page 1</a>
</li>
<li class="page_item page-item-285">
<a href="http://192.168.8.200/www/parent-page/child-page-2/">Child Page 2</a>
</li>
<li class="page_item page-item-286">
<a href="http://192.168.8.200/www/parent-page/child-page-3/">Child Page 3</a>
</li>
</ul>
OUTPUT ON A CHILD PAGE
<ul>
<li class="page_item page-item-282 current_page_ancestor current_page_parent">
<a href="http://192.168.8.200/www/parent-page/">Parent page</a>
</li>
<li class="page_item page-item-283 current_page_item">
<a href="http://192.168.8.200/www/parent-page/child-page-1/" aria-current="page">Child Page 1</a>
</li>
<li class="page_item page-item-285">
<a href="http://192.168.8.200/www/parent-page/child-page-2/">Child Page 2</a>
</li>
<li class="page_item page-item-286">
<a href="http://192.168.8.200/www/parent-page/child-page-3/">Child Page 3</a>
</li>
</ul>