Ticket #33932: patch.4.diff

wp-admin/includes/class-wp-upgrader.php

@@ -3357 +3357 @@
 
                 // Plugins, Themes, Translations
                 foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
+                
+            /**
+            * Filter to receive notification emails on plugins/themes/translation.
+            *
+            * By default, administrators are notified when the update offer received
+            * from WordPress.org sets a particular flag. This allows some discretion
+            * in if and when to notify.
+            *
+            * This filter is only evaluated once per plugin update
+            *.
+            *
+            * @since 4.4.0
+            *
+            * @param bool   $notify Whether the site administrator is notified.
+            * @param string $type   The type of update (plugin, theme, translation).
+            * @param object $this WP_Automatic_Updater instance
+            */
+                if ( !apply_filters( 'send_update_notification_email', true, $type, $this ) ) {
+                        continue;
+            }
                         if ( ! isset( $this->update_results[ $type ] ) )
                                 continue;
                         $success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
@@ -3390 +3410 @@
                         }
                         $body[] = '';
                 }
+                
+                if ( empty( $body ) {
+                return;
+       }
 
                 $site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
                 if ( $failures ) {