Ticket #30415: 30415.2.diff

wp-includes/category-template.php

@@ -40 +40 @@
  * @return string|WP_Error A list of category parents on success, WP_Error on failure.
  */
 function get_category_parents( $id, $link = false, $separator = '/', $nicename = false, $visited = array() ) {
-        $chain = '';
-        $parent = get_term( $id, 'category' );
-        if ( is_wp_error( $parent ) )
-                return $parent;
-
-        if ( $nicename )
-                $name = $parent->slug;
-        else
-                $name = $parent->name;
-
-        if ( $parent->parent && ( $parent->parent != $parent->term_id ) && !in_array( $parent->parent, $visited ) ) {
-                $visited[] = $parent->parent;
-                $chain .= get_category_parents( $parent->parent, $link, $separator, $nicename, $visited );
-        }
-
-        if ( $link )
-                $chain .= '<a href="' . esc_url( get_category_link( $parent->term_id ) ) . '">'.$name.'</a>' . $separator;
-        else
-                $chain .= $name.$separator;
-        return $chain;
+        return get_term_parents( $id, $link, $separator, $nicename, $visited, 'category' );
 }
 
 /**
@@ -1403 +1384 @@
 
         return $r;
 }
+
+/**
+ * Retrieve term parents with separator.
+ *
+ * @since 4.1.0
+ *
+ * @param int $id Taxonomy term ID.
+ * @param bool $link Optional, default is false. Whether to format with link.
+ * @param string $separator Optional, default is '/'. How to separate terms.
+ * @param bool $nicename Optional, default is false. Whether to use nice name for display.
+ * @param array $visited Optional. Already linked to terms to prevent duplicates.
+ * @param string $taxonomy Optional, default is 'category'. Which taxonomy the term belongs to.
+ * @return string|WP_Error A list of term parents on success, WP_Error on failure.
+ */
+function get_term_parents( $id, $link = false, $separator = '/', $nicename = false, $visited = array(), $taxonomy = 'category' ) {
+
+        if( ! is_taxonomy_hierarchical( $taxonomy ) ) {
+                return new WP_Error( 'taxonomy_not_hierarchical', sprintf( __( 'The "%s" taxonomy is not hierarchical.' ), $taxonomy ) );
+        }
+
+        $chain = '';
+        $parent = get_term( $id, $taxonomy );
+        if ( is_wp_error( $parent ) ) {
+                return $parent;
+        }
+
+        if ( $nicename ) {
+                $name = $parent->slug;
+        } else {
+                $name = $parent->name;
+        }
+
+        if ( $parent->parent && ( $parent->parent != $parent->term_id ) && !in_array( $parent->parent, $visited ) ) {
+                $visited[] = $parent->parent;
+                $chain .= get_term_parents( $parent->parent, $link, $separator, $nicename, $visited, $taxonomy );
+        }
+
+        if ( $link ) {
+                $chain .= '<a href="' . esc_url( get_term_link( $parent->term_id, $taxonomy ) ) . '">'.$name.'</a>' . $separator;
+        } else {
+                $chain .= $name.$separator;
+        }
+
+        return $chain;
+}