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* Generate markup for the featured image above each page.
* If a featured image does not exist for the current page we will try and pull one from the parent page. If we still
* haven't found a featured image we will try and pull one from the 'page_on_front' (when using a static front-page).
* Otherwise we show nothing.
function featured_image( $size = 'post-thumbnail' )
global $post;
if ( !is_page() ) {
$the_post_thumbnail = get_the_post_thumbnail( $size );
// Get post_thumbnail from top most parent if we haven't found one yet.
if ( empty( $the_post_thumbnail ) ) {
$page_parents = get_post_ancestors( $post );
$topmost_parent = array_pop( $page_parents );
$the_post_thumbnail = get_the_post_thumbnail( $topmost_parent );
// Get post_thumbnail from "Front Page" template if we still don't find one.
if ( empty( $the_post_thumbnail ) ) {
$the_post_thumbnail = get_the_post_thumbnail( get_option( 'page_on_front' ), $size );
echo $the_post_thumbnail;
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