Introduce get_ancestors(). Props filosofo. Fixes #12443
git-svn-id: https://develop.svn.wordpress.org/trunk@15631 602fd350-edb4-49c9-b593-d223f7449a82
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@ -2775,3 +2775,40 @@ function is_object_in_taxonomy($object_type, $taxonomy) {
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return false;
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}
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/**
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* Get an array of ancestor IDs for a given object.
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*
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* @param int $object_id The ID of the object
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* @param string $object_type The type of object for which we'll be retrieving ancestors.
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* @return array of ancestors from lowest to highest in the hierarchy.
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*/
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function get_ancestors($object_id = 0, $object_type = '') {
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$object_id = (int) $object_id;
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$ancestors = array();
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if ( empty( $object_id ) ) {
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return apply_filters('get_ancestors', $ancestors, $object_id, $object_type);
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}
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if ( is_taxonomy_hierarchical( $object_type ) ) {
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$term = get_term($object_id, $object_type);
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while ( ! is_wp_error($term) && ! empty( $term->parent ) && ! in_array( $term->parent, $ancestors ) ) {
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$ancestors[] = (int) $term->parent;
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$term = get_term($term->parent, $object_type);
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}
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} elseif ( null !== get_post_type_object( $object_type ) ) {
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$object = get_post($object_id);
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if ( ! is_wp_error( $object ) && isset( $object->ancestors ) && is_array( $object->ancestors ) )
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$ancestors = $object->ancestors;
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else {
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while ( ! is_wp_error($object) && ! empty( $object->post_parent ) && ! in_array( $object->post_parent, $ancestors ) ) {
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$ancestors[] = (int) $object->post_parent;
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$object = get_post($object->post_parent);
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}
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}
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}
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return apply_filters('get_ancestors', $ancestors, $object_id, $object_type);
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}
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