Ticket #20523: 20523-revert.diff

src/wp-admin/includes/ajax-actions.php

@@ -1196 +1196 @@
         /** This filter is documented in wp-admin/includes/nav-menu.php */
         $walker_class_name = apply_filters( 'wp_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', $_POST['menu'] );
 
-        if ( ! class_exists( $walker_class_name, false ) )
+        if ( ! class_exists( $walker_class_name ) )
                 wp_die( 0 );
 
         if ( ! empty( $menu_items ) ) {

src/wp-admin/includes/nav-menu.php

@@ -899 +899 @@
                  */
                 $walker_class_name = apply_filters( 'wp_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', $menu_id );
 
-                if ( class_exists( $walker_class_name, false ) ) {
+                if ( class_exists( $walker_class_name ) ) {
                         $walker = new $walker_class_name;
                 } else {
                         return new WP_Error( 'menu_walker_not_exist',

src/wp-includes/admin-bar.php

@@ -39 +39 @@
          * @param string $wp_admin_bar_class Admin bar class to use. Default 'WP_Admin_Bar'.
          */
         $admin_bar_class = apply_filters( 'wp_admin_bar_class', 'WP_Admin_Bar' );
-        if ( class_exists( $admin_bar_class, false ) )
+        if ( class_exists( $admin_bar_class ) )
                 $wp_admin_bar = new $admin_bar_class;
         else
                 return false;