Ticket #18752: 18752.2.diff

wp-includes/default-filters.php

@@ -196 +196 @@
 add_filter( 'nav_menu_meta_box_object', '_wp_nav_menu_meta_box_object'        );
 add_filter( 'widget_text',              'shortcode_unautop'                   );
 add_filter( 'widget_text',              'do_shortcode'                        );
+add_filter( 'post_link_categories',     '_sort_terms_by_id'                   );
 
 // Actions
 add_action( 'wp_head',             'wp_enqueue_scripts',              1     );

wp-includes/link-template.php

@@ -121 +121 @@
                 if ( strpos($permalink, '%category%') !== false ) {
                         $cats = get_the_category($post->ID);
                         if ( $cats ) {
-                                usort($cats, '_usort_terms_by_ID'); // order by ID
+                                $cats = apply_filters( 'post_link_categories', $cats );
                                 $category = $cats[0]->slug;
                                 if ( $parent = $cats[0]->parent )
                                         $category = get_category_parents($parent, false, '/', true) . $category;
@@ -1128 +1128 @@
                         }
 
                         $excluded_categories = array_map( 'intval', $excluded_categories );
-                                
+
                         if ( ! empty( $cat_array ) ) {
                                 $excluded_categories = array_diff($excluded_categories, $cat_array);
                                 $posts_in_ex_cats_sql = '';
@@ -1276 +1276 @@
         $cat_array = array();
         if( ! is_array( $excluded_categories ) )
                 $excluded_categories = explode( ',', $excluded_categories );
-                
+
         if ( $in_same_cat || ! empty( $excluded_categories ) ) {
                 if ( $in_same_cat )
                         $cat_array = wp_get_object_terms( $post->ID, 'category', array( 'fields' => 'ids' ) );

wp-includes/category-template.php

@@ -126 +126 @@
 }
 
 /**
+ * Sort terms by ID.
+ *
+ * Used with the post_link_categories filter.
+ *
+ * @since 3.3.0
+ * @access private
+ *
+ * @param array $terms
+ *
+ * @return array Sorted terms
+ */
+function _sort_terms_by_id ( $terms ) {
+        usort( $terms, '_usort_terms_by_ID' );
+        return $terms;
+}
+
+/**
  * Retrieve category name based on category ID.
  *
  * @since 0.71