Make featured image be shareable across multiple pages?

Question

Basically I'm looking to share the same featured image across multiple sub pages under their respective primary page.

Is there any plugin that lets me do this, so they can inherit a featured image?

Answer 1

You could easily do this by hooking into the save_post action and updating the featured image custom field. In your functions.php file, add the following code:

function interit_featured_image( $post_id ) {

    // Get Parent ID
    $parent_id = wp_get_post_parent_id( $post_id );

    // Only proceed if this page has a parent
    if ($parent_id != 0) :

        // Get Parent Thumbnail
        $parent_thumbnail = get_post_meta( $parent_id, '_thumbnail_id', true );

        // Get Parent Caption Data (for the other plugin)
        $parent_caption = get_post_meta( $parent_id, '_cc_featured_image_caption', true );

        // Set Thumbnail
        update_post_meta( $post_id, '_thumbnail_id', $parent_thumbnail );

        // Set Caption (again, for the other plugin)
        update_post_meta( $post_id, '_cc_featured_image_caption', $parent_caption );


    endif;

}
add_action( 'save_post', 'interit_featured_image' );