Ticket #24348: 24348.1.patch

wp-includes/media.php

@@ -2420 +2420 @@
  *
  * @param string $attached_size If an attached image is found, the size to display it.
  * @param WP_Post $post Optional. Used instead of global $post when passed.
+ *
+ * @return string HTML for the image. Blank string if no image is found.
  */
 function get_the_post_format_image( $attached_size = 'full', &$post = null ) {
         if ( empty( $post ) )
@@ -2566 +2568 @@
                 $post->format_content[ $cache_key ] = sprintf( $link_fmt, $html );
                 return $post->format_content[ $cache_key ];
         }
+
+        $featured_image = get_the_post_thumbnail( $post->ID, $attached_size );
+        if ( ! empty( $featured_image ) ) {
+                $image = sprintf( $link_fmt, $featured_image );
+                $post->format_content[ $cache_key ] = $image;
+                return $image;
+        }
+
+        return '';
 }
 
 /**