get_page_children() not returning all child pages

5 comments

1. There is nothing wrong with get_page_children() or new WP_Query(). By default WP_Query returns only the last x number of pages created. It’s the limit imposed on WP_Query.

   get_page_children() simply takes the pages array returned by WP_Query and filters the children pages from that list. According to WordPress Codex: get_page_children “…does not make any SQL queries to get the children.”

   To fix the issue simply use:

       $query = new WP_Query( 'posts_per_page=-1' );
   

   Your code with the fix:

       <?php 
       $my_wp_query = new WP_Query();
       $all_wp_pages = $my_wp_query->query(array('post_type' => 'page', 'posts_per_page' => -1));
   
       $staff = get_page_children(8, $all_wp_pages);
   
       foreach($staff as $s){
           $page = $s->ID;
           $page_data = get_page($page);
           $content = $page_data->post_content;
           $content = apply_filters('the_content',$content);
           $content = str_replace(']]>', ']]>', $content);
           echo '<div class="row-fluid"><span class="span4">'; 
           echo get_the_post_thumbnail( $page ); 
           echo '</span><span class="span8">'.$content.'</span></div>';
       } 
       ?>
   

   Here is a helper function that you can call whenever you need to get page children

       function my_get_page_children( $page_id, $post_type = 'page' ) {
           // Set up the objects needed
           $custom_wp_query = new WP_Query();
           $all_wp_pages    = $custom_wp_query->query( array( 'post_type' => $post_type, 'posts_per_page' => -1 ) );
   
           // Filter through all pages and find specified page's children
           $page_children = get_page_children( $page_id, $all_wp_pages );
   
           return $page_children;
       }
   

   Example

   You code with with the helper function

       foreach(my_get_page_children(8) as $s){
           $page = $s->ID;
           $page_data = get_page($page);
           $content = $page_data->post_content;
           $content = apply_filters('the_content',$content);
           $content = str_replace(']]>', ']]>', $content);
           echo '<div class="row-fluid"><span class="span4">'; 
           echo get_the_post_thumbnail( $page ); 
           echo '</span><span class="span8">'.$content.'</span></div>';
       } 
   

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2. I’ve had a similar problem – looks like get_page_children behaves weird… (in my case, for one page which had three children it returned three, for another with four it returned zero! – can’t work it out..)

   I got round it by using a custom query instead:

   $params = array(
   'post_type'=>'page',
   'post_parent'=> 8,
   );
   $staff = query_posts($params);
   

   Similar here: http://www.sanraul.com/2010/08/28/get-page-children/

   NOTE: depending on where you use this, you might need a wp_reset_query(); as well – or else that query_posts() could break your main loop!

   Hope that helps! – A

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3. $curID = get_the_ID();
   
   query_posts(
       array(
           'post_type'=>'page',
           'post_parent'=>$curID,
           'orderby' => 'menu_order',
           'order' => 'ASC'
       )
   );
   
   echo '<ul>';
   while ( have_posts() ) : the_post();
       echo '<li><a href="'.get_permalink().'">'.get_the_title().'</a></li>';
   endwhile;
   echo '</ul>';
   
   wp_reset_query();
   

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4. SEE EDIT BELOW

   Having just experienced and solved this issue, I thought I’d share the approach I had to take.

   Originally, I used a new WP_Query to grab all pages and then fed the query result to get_page_children():

   $all_pages = new WP_Query( array( 'post_type' => 'page' ) );
   wp_reset_postdata();
   $page_id = get_the_ID();
   
   // pass $all_pages as the second parameter
   $page_children = get_page_children( $page_id, $all_pages );
   
   foreach ( $page_children as $childObj ) {
       echo '<a href="' . $childObj->guid . '">' . $childObj->post_title . '</a>'
   }
   

   For whatever reason, the above code did not work for me.

   Instead, I passed the ‘posts’ object of $all_pages as the second parameter, like so:

   $all_pages = new WP_Query( array( 'post_type' => 'page' ) );
   wp_reset_postdata();
   $page_id = get_the_ID();
   
   // pass the posts object of $all_pages as the second parameter
   $page_children = get_page_children( $page_id, $all_pages->posts );
   
   foreach ( $page_children as $childObj ) {
       echo '<a href="' . $childObj->guid . '">' . $childObj->post_title . '</a>';
   }
   

   I hope this helps someone!

   ---

   EDIT:
   After experiencing more trouble with the get_page_children() function, I choose a different route entirely that has been working consistently to achieve the same end result:

   $page = get_queried_object();
   $children = get_pages( 'child_of=' . $page->ID . '&parents=' . $page->ID );
   
   // loop through the child page links
   foreach ( $children as $child ) {
       echo '<a href="' . get_permalink( $child->ID ) . '">' . get_the_title( $child->ID ) . '</a>';
   }
   

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5. You can simply use

   $args = array(
           'post_parent' => $parent_id ,
           'post_type'   => 'page', 
           'numberposts' => -1,
           'post_status' => 'publish' 
       );
       $children = get_children( $args );
   

   $children variable will give you to all children pages of parent ID. if you are using WP_Query make sure to reset query after code for more info
   https://developer.wordpress.org/reference/functions/get_page_children/

   use this code in your functions.php file and call function with parent page id

       function load_clildren( $parent_id=null ){
       $parent_id  =   ( $parent_id ) ? $parent_id : $post->ID;
   
       $args = array(
           'post_parent' => $parent_id ,
           'post_type'   => 'page', 
           'numberposts' => -1,
           'post_status' => 'publish' 
       );
       $children = get_children( $args );
       return $children;
   }
   

   function call method

   $ch_pages   =   load_clildren( $parent_id );
   

   or
   using in parent page

   $ch_pages   =   load_clildren();
   

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