Ticket #21543: 21543.4.diff

src/wp-admin/edit-form-advanced.php

@@ -157 +157 @@
         else
                 $tax_meta_box_id = $tax_name . 'div';
 
-        add_meta_box( $tax_meta_box_id, $label, $taxonomy->meta_box_cb, null, 'side', 'core', array( 'taxonomy' => $tax_name ) );
+        if ( false !== $taxonomy->meta_box_cb )
+                add_meta_box( $tax_meta_box_id, $label, $taxonomy->meta_box_cb, null, 'side', 'core', array( 'taxonomy' => $tax_name ) );
 }
 
 if ( post_type_supports($post_type, 'page-attributes') )

src/wp-includes/taxonomy.php

@@ -289 +289 @@
  *     * If not set, the default is inherited from public.
  * - show_tagcloud - Whether to list the taxonomy in the Tag Cloud Widget.
  *     * If not set, the default is inherited from show_ui.
- * - meta_box_cb - Provide a callback function for the meta box display. Defaults to
- *     post_categories_meta_box for hierarchical taxonomies and post_tags_meta_box for non-hierarchical.
+ * - meta_box_cb - Provide a callback function for the meta box display.
+ *     * If not set, defaults to post_categories_meta_box for hierarchical taxonomies
+ *     and post_tags_meta_box for non-hierarchical.
+ *     * If false, no meta box is shown.
  * - capabilities - Array of capabilities for this taxonomy.
  *     * You can see accepted values in this function.
  * - rewrite - Triggers the handling of rewrites for this taxonomy. Defaults to true, using $taxonomy as slug.