Title: Lee Kung's Replies | WordPress.org

---

# Lee Kung

  [  ](https://wordpress.org/support/users/grmark/)

 *   [Profile](https://wordpress.org/support/users/grmark/)
 *   [Topics Started](https://wordpress.org/support/users/grmark/topics/)
 *   [Replies Created](https://wordpress.org/support/users/grmark/replies/)
 *   [Reviews Written](https://wordpress.org/support/users/grmark/reviews/)
 *   [Topics Replied To](https://wordpress.org/support/users/grmark/replied-to/)
 *   [Engagements](https://wordpress.org/support/users/grmark/engagements/)
 *   [Favorites](https://wordpress.org/support/users/grmark/favorites/)

 Search replies:

## Forum Replies Created

Viewing 1 replies (of 1 total)

 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[PDF Image Generator] attachment not update on edit post, replace pdf](https://wordpress.org/support/topic/attachment-not-update-on-edit-post-replace-pdf/)
 *  Thread Starter [Lee Kung](https://wordpress.org/support/users/grmark/)
 * (@grmark)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/attachment-not-update-on-edit-post-replace-pdf/#post-7052538)
 * sorry, the second point is already correct
    here is what I do to get correct 
   pdf_id
 *     ```
       //in post loop
       $image_id = get_post_meta( $post->ID, '_thumbnail_id', true );
       if($image_id) {
           $image = get_post($image_id);
           if($image && $image->post_parent > 0) {
               $pdf = get_post($image->post_parent);
               if($pdf && $pdf->post_mime_type == 'application/pdf') {
                   $pdf_url = wp_get_attachment_url($pdf->ID);
               }
           }
       }
       ```
   

Viewing 1 replies (of 1 total)