Ticket #18829: post.php.patch

wp-admin/includes/post.php

@@ -1065 +1065 @@
  * @return unknown
  */
 function postbox_classes( $id, $page ) {
-        if ( isset( $_GET['edit'] ) && $_GET['edit'] == $id ) {
-                $classes = array( '' );
-        } elseif ( $closed = get_user_option('closedpostboxes_'.$page ) ) {
-                if ( !is_array( $closed ) ) {
-                        $classes = array( '' );
-                } else {
-                        $classes = in_array( $id, $closed ) ? array( 'closed' ) : array( '' );
-                }
-        } else {
-                $classes = array( '' );
-        }
+    $classes = array();
+    $closed = get_user_option( 'closedpostboxes_'.$page );
+    if ( is_array( $closed ) && in_array( $id, $closed ) ) {
+        $classes[] = 'closed';
+    }
 
         $classes = apply_filters( "postbox_classes_{$page}_{$id}", $classes );
-        return implode( ' ', $classes );
+        return empty( $classes ) ? '' : implode( ' ', $classes );
 }
 
 /**