Check if a page is a parent or if it's a child page?

Question

Is it possible to check if a page is a parent or if it\'s a child page?

I have my pages set up like this:

-- Parent

---- Child page 1

---- Child

Answer 1

Put this function in the functions.php file of your theme.

function is_page_child($pid) {// $pid = The ID of the page we're looking for pages underneath
  global $post;         // load details about this page
  $anc = get_post_ancestors( $post->ID );
  foreach($anc as $ancestor) {
      if(is_page() && $ancestor == $pid) {
          return true;
      }
  }
  if(is_page()&&(is_page($pid)))
     return true;   // we're at the page or at a sub page
  else
      return false;  // we're elsewhere
};

Then you can use it: