Ticket #14541: 14541.diff

wp-admin/includes/template.php

@@ -1000 +1000 @@
  * @param string $id String for use in the 'id' attribute of tags.
  * @param string|object $screen The screen on which to show the box (post, page, link).
  * @param string $context The context within the page where the boxes should show ('normal', 'advanced').
+ * @return boolean False on failure, true on success.
  */
 function remove_meta_box($id, $screen, $context) {
         global $wp_meta_boxes;
@@ -1018 +1019 @@
         if ( !isset($wp_meta_boxes[$page][$context]) )
                 $wp_meta_boxes[$page][$context] = array();
 
-        foreach ( array('high', 'core', 'default', 'low') as $priority )
-                $wp_meta_boxes[$page][$context][$priority][$id] = false;
+        foreach ( array('high', 'core', 'default', 'low') as $priority ) {
+                if ( isset($wp_meta_boxes[$page][$context][$priority][$id]) ) {
+                        $wp_meta_boxes[$page][$context][$priority][$id] = false;
+                        return true;
+                }
+        }
+
+        return false;
 }
 
 /**