wordpress - Get a ACF field using get_pages() -

i'm displaying list of sibling pages using below code. retrieving page title , link. need grab custom field called excerpt , output each sibling item. how do using get_pages? var_dump i'm using grabbing current pages excerpt, incorrect.

<?php     global $post;     if ( is_page() && $post->post_parent ) {          $children = get_pages('child_of='.$post->id);         $parent = $post->post_parent;         $our_pages = get_pages('child_of='.$parent.'&exclude='.$post->id);         $ex = get_field('excerpt', $our_pages);          if (!empty($our_pages)):             foreach ($our_pages $key => $page_item):                 <a href="<?php echo esc_url(get_permalink($page_item->id)); ?>" title="<?php the_title(); ?>">                     <?php echo $page_item->post_title ; ?>                     <?php var_dump($ex) ?>             <?php endforeach;         endif;      } 

update

ok have put in <?php print_r($page_item); ?> suggested , has returned following:

i don't see of acf fields here, how retrieve those? next steps?

you full code below:

<?php global $post; if ( is_page() && $post->post_parent ) {      $children = get_pages('child_of='.$post->id);     $parent = $post->post_parent;     $our_pages = get_pages('child_of='.$parent.'&exclude='.$post->id);     $ex = get_field('excerpt', $our_pages);      if (!empty($our_pages)):         foreach ($our_pages $key => $page_item):             <a href="<?php echo esc_url(get_permalink($page_item->id)); ?>" title="<?php the_title(); ?>">                 <?php echo $page_item->post_title ; ?>                 <?php echo get_post_meta( $page_item->id, 'excerpt', true); ?>         <?php endforeach;     endif;  } 

if didn't data above change custom filed name other name , try.