Ticket #12908: get_term_ancestors.diff

wp-includes/category.php

@@ -209 +209 @@
 function cat_is_ancestor_of( $cat1, $cat2 ) {
         if ( ! isset($cat1->term_id) )
                 $cat1 = &get_category( $cat1 );
-        if ( ! isset($cat2->parent) )
+        if ( ! isset($cat2->term_id) )
                 $cat2 = &get_category( $cat2 );
 
-        if ( empty($cat1->term_id) || empty($cat2->parent) )
+        if ( empty($cat1->term_id) || empty($cat2->term_id) )
                 return false;
-        if ( $cat2->parent == $cat1->term_id )
-                return true;
 
-        return cat_is_ancestor_of( $cat1, get_category( $cat2->parent ) );
+        return in_array($cat1->term_id, get_term_ancestors($cat2->term_id, 'category'));
 }
 
 

wp-includes/taxonomy.php

@@ -584 +584 @@
 }
 
 /**
+ * Get the list of all ancestors of a certain term
+ *
+ * @package WordPress
+ * @subpackage Taxonomy
+ * @since 3.1.0
+ *
+ * @uses get_terms()
+ *
+ * @param string $taxonomy Taxonomy Name
+ * @return array List of ancestor ids, from lowest to highest in the hierarchy
+ */
+function get_term_ancestors($term_id, $taxonomy) {
+        if ( !is_taxonomy_hierarchical($taxonomy) )
+                return array();
+
+        $parents = get_terms($taxonomy, array('get' => 'all', 'orderby' => 'id', 'fields' => 'id=>parent'));
+
+        $ancestors = array();
+        while ( $parents[$term_id] > 0 )
+                $term_id = $ancestors[] = $parents[$term_id];
+
+        return $ancestors;
+}
+
+/**
  * Get sanitized Term field.
  *
  * Does checks for $term, based on the $taxonomy. The function is for contextual