The code snippet below is handy when you are trying to check if the current page is a parent or a child in a WordPress theme. You can then use the conditional to output different code depending on the page depth it is
<?php
// gets page depth
global $wp_query;
$object = $wp_query->get_queried_object();
$parent_id = $object->post_parent;
$depth = 0;
while ($parent_id > 0) {
$page = get_page($parent_id);
$parent_id = $page->post_parent;
$depth++;
}
// echo $depth;
?>
<?php if ( $depth == 0 ) {
echo 'page level 0';
} elseif ( $depth == 1 ) {
echo 'page level 1';
} else {
echo 'something else';
}?>
