Does anybody understands how to obtain the ORDER number placed in page characteristics? I want only the number and when isn't set, to provide me an specific number (1, or whatever I would like) for those pages who don't put on order page number set.
I am unsure of what you would like...
If you wish to retrieve recption menus_order from the publish/page you should use something similar to
<?php $id=1; $default = 42; get_post($id); //you can use any kind of query or use it in the loop global $post; if(empty($post->menu_order)) //if not set give the value you want $post->menu_order = $default; //note that it won't update the value in the database echo $post->menu_order; wp_reset_query(); ?>