Ticket #41842: 41842.2.diff

src/wp-includes/comment.php

@@ -2550 +2550 @@
  *
  * @param string $content Post content to check for links. If empty will retrieve from post.
  * @param int|WP_Post $post_id Post Object or ID.
+ *
+ * @return bool True on success, false if no post is available for the given ID.
  */
 function pingback( $content, $post_id ) {
         include_once( ABSPATH . WPINC . '/class-IXR.php' );
@@ -2560 +2562 @@
 
         $post = get_post( $post_id );
         if ( ! $post ) {
-                return;
+                return false;
         }
 
         $pung = get_pung( $post );
@@ -2637 +2639 @@
                                 add_ping( $post, $pagelinkedto );
                 }
         }
+
+        return true;
 }
 
 /**