Ticket #33932: 33932.2.patch

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

@@ -3472 +3472 @@
          */
         protected function send_debug_email() {
                 $update_count = 0;
-                foreach ( $this->update_results as $type => $updates )
+                $update_results = $this->update_results;
+                foreach ( $update_results as $type => $updates )
                         $update_count += count( $updates );
 
                 $body = array();
@@ -3481 +3482 @@
                 $body[] = sprintf( __( 'WordPress site: %s' ), network_home_url( '/' ) );
 
                 // Core
-                if ( isset( $this->update_results['core'] ) ) {
-                        $result = $this->update_results['core'][0];
+                if ( isset( $update_results['core'] ) ) {
+                        $result = $update_results['core'][0];
                         if ( $result->result && ! is_wp_error( $result->result ) ) {
                                 $body[] = sprintf( __( 'SUCCESS: WordPress was successfully updated to %s' ), $result->name );
                         } else {
@@ -3494 +3495 @@
 
                 // Plugins, Themes, Translations
                 foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
-                        if ( ! isset( $this->update_results[ $type ] ) )
-                                continue;
-                        $success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
+
+                        /**  
+                         * Filter whether to disable debug notification emails on plugins/themes/translation.
+                         *
+                         * By default, WordPress administrators are sent a debug e-mail for
+                         * automatic updates or when in development mode. This filter is
+                         * primarly used to disable automatic update notification e-mails
+                         * per type of update.
+                         *
+                         * @since 4.6.0
+                         *
+                         * @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_debug_notification_email', true, $type, $this ) ) { 
+                                if ( isset( $update_results[ $type ] ) ) { 
+                                        unset( $update_results[ $type ] ); 
+                                }  
+                        }  
+
+                        if ( ! isset( $update_results[ $type ] ) ) 
+                                continue; 
+
+                        $success_items = wp_list_filter( $update_results[ $type ], array( 'result' => true ) );
                         if ( $success_items ) {
                                 $messages = array(
                                         'plugin'      => __( 'The following plugins were successfully updated:' ),
@@ -3509 +3532 @@
                                         $body[] = ' * ' . sprintf( __( 'SUCCESS: %s' ), $name );
                                 }
                         }
-                        if ( $success_items != $this->update_results[ $type ] ) {
+                        if ( $success_items != $update_results[ $type ] ) {
                                 // Failed updates
                                 $messages = array(
                                         'plugin'      => __( 'The following plugins failed to update:' ),
@@ -3518 +3541 @@
                                 );
 
                                 $body[] = $messages[ $type ];
-                                foreach ( $this->update_results[ $type ] as $item ) {
+                                foreach ( $update_results[ $type ] as $item ) {
                                         if ( ! $item->result || is_wp_error( $item->result ) ) {
                                                 $body[] = ' * ' . sprintf( __( 'FAILED: %s' ), $item->name );
                                                 $failures++;
@@ -3528 +3551 @@
                         $body[] = '';
                 }
 
+                if ( empty( $update_results ) ) {  
+                        return; 
+                }
+
                 $site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
                 if ( $failures ) {
                         $body[] = trim( __(
@@ -3554 +3581 @@
                 $body[] = '';
 
                 foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
-                        if ( ! isset( $this->update_results[ $type ] ) )
+                        if ( ! isset( $update_results[ $type ] ) )
                                 continue;
-                        foreach ( $this->update_results[ $type ] as $update ) {
+
+                        foreach ( $update_results[ $type ] as $update ) {
                                 $body[] = $update->name;
                                 $body[] = str_repeat( '-', strlen( $update->name ) );
                                 foreach ( $update->messages as $message )