I have Post Object field set up for pages. What I want to do is to output title of the posts associated with the page as a class of the div surrounding the page listing. But, the code inside the foreach loop is not being executed. I've tried with setup_postdata($post) and without, per ACF documentation, the result is always the same.

Here is the code:

function pages() {
$args = array(
    'post_type' => 'page'
$pages = get_posts($args);
    foreach ($pages as $page) {?>
        <div class=" <?php 
            $ancestors = get_field('ancestor');
                foreach ($ancestors as $ancestor) {
                    $class_ancestor_raw = get_the_title($ancestor->ID);
                    $class_ancestor_temp = explode(' ', $class_ancestor_raw);
                    $class_ancestor_str = implode('-', $class_ancestor_temp);
                    $class_ancestor = strtolower($class_ancestor_str);
                    echo $class_ancestor;

            <?php echo $page->post_title; ?>
    <?php } ?> 

  • Just double checking, but you have the 'ancestor' post object field set up as a multi-select, correct? Otherwise the foreach won't do anything.
    – socki03
    Feb 7, 2014 at 15:45
  • yes it's multiselect Feb 7, 2014 at 15:46
  • 1
    Are you attempting to select the ancestor for each page? because it looks like you're missing the "$page->ID" on the get_field function $ancestors = get_field('ancestor', $page->ID);
    – socki03
    Feb 7, 2014 at 15:52
  • 1
    that's it! thank you, if you post it as an answer i ll accept it as @Milo posted the answer after your comment. thanks! Feb 7, 2014 at 16:07

2 Answers 2


Looks like you're missing the $page->ID from the get_field function.

$ancestors = get_field('ancestor', $page->ID);

You don't pass the page ID to get_field, so you're trying to fetch ancestor for the page you have this code on, not the pages within your foreach.

$ancestors = get_field('ancestor', $page->ID);

You can also simplify your code with the sanitize_title function-

$class_ancestor = sanitize_title( get_the_title($ancestor->ID) );

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