Displaying All Parent Pages as Featured Images

Question

Here is a look at my current code to display all "children" pages of current post_parent (Also would be helpful to know how to display custom parent pages as well...)

<?php
$args = array(
    'post_parent' => $post->ID,
    'post_type' => 'page',
    'orderby' => 'menu_order',
    'order'=>'ASC',
);
$my_query = new WP_Query($args);
if($my_query->have_posts()) :
    while($my_query->have_posts()) : 
        $my_query->the_post();
      // your stuff goes in this bit.
     if ( has_post_thumbnail() ) : 
         $imgdata = wp_get_attachment_image_src( get_post_thumbnail_id(), 'large' );
         $imgwidth = $imgdata[1]; // thumbnail's width
         $imgheight = $imgdata[2]; // thumbnail's height
  ?>
   <div class="child element isotope-item" style="width:<?php echo $imgwidth;?>;height:<?php echo $imgheight;?>;">
    <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
      <?php echo the_post_thumbnail(large); ?>
      <span class="child_title"><?php echo the_title_attribute();?></span>
    </a>
  </div>
  <?php
    endif;
    // end your stuff.
    endwhile;
else :
    // Do the no posts found message 
endif;
?>
</div>

Answer 1

To get all the "root" pages of a site:

$args = array(
    'post_type' => 'page',
    'child_of' => 0,
);
$pages = get_pages( $args );
foreach( $pages as $page ) {
    if( has_post_thumbnail( $page->ID ) {
        $imgdata = wp_get_attachment_image_src( get_post_thumbnail_id(), 'large' );
        $imgwidth = $imgdata[1]; // thumbnail's width
        $imgheight = $imgdata[2]; // thumbnail's height
    }
}
// handle the image as in your posted code

To get your custom post type, you should be able to replace 'post_type' => 'page' with your CPT's name (eg, 'post_type' => 'my_post_type').

Reference

• get_pages()