Targeting all pages except top level pages

Question

I have used '0' == $post->post_parent successfully in my templates to target top level pages.

However, I cannot seem to target all pages EXCEPT top level pages:

    <?php 
    if ( '0' !== $post->post_parent ) { 
        include 'siblings.php'; 
    } 
    ?>               

Using the code above, the file is still included in top level pages.

Note, I can get it working using the code below, but I want to keep it flexible and not have to specify IDs:

    <?php 
    if ( !is_page( array( 8, 10, 12 )) && (is_tree(8) || is_tree(10) || is_tree(12)) ) { 
        include 'siblings.php'; 
    } 
    ?>

Hope someone can help!

Answer 1

Try this:

  <?php 
    if ( '0' != $post->post_parent) { 
        include 'siblings.php'; 
    } 
    ?> 

!== refers to an exact type match too. So your code doesn't work because the post id is stored as an integer. != will disregard the fact that you are comparing a string to a number.

Hope this helps.

You could also simply use the integer 0 in place of '0' in the first place...