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

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:

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— Parent

—- Child page 1

—- Child page 2

etc.

I want to show a certain menu if it’s a parent page and a different menu if it’s on the child page.

I know I can do something like below but I want to make it a bit more dynamic without including specific page ID’s.

<?php
if ($post->post_parent == '100') { // if current page is child of page with page ID 100
   // show image X 
}
?>

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5 comments

  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:

    <?php 
        if(is_page_child(100)) {
            // show image X 
        } 
    ?>
    
  2. I know this is an old question but I was searching for this same question and couldn’t find a clear and simple answer until I came up with this one. My answer doesn’t answer his explanation but it answers the main question which is what I was looking for.

    This checks whether a page is a child or a parent and allows you to show, for example a sidebar menu, only on pages that are either a child or a parent and not on pages that do not have a parent nor children.

    <?php 
       global $post;    
       $children = get_pages( array( 'child_of' => $post->ID ) );
       if ( is_page() && ($post->post_parent || count( $children ) > 0  )) : 
    ?>
    
  3. You can use the get_pages() function. it takes an associative array as an argument. you can give that array ‘child_of’ => get_the_ID() to get the children of the current page, and if it hasn’t any children the whole get_pages() function will return false, otherwise it will return a value that evaluates to true, which can be assigned to a variable to use as a conditional in an if statement.

    $iAmParent = get_pages(array('child_of' => get_the_ID()));