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Introduce get_ancestors(). Props filosofo. Fixes #12443 

git-svn-id: http://svn.automattic.com/wordpress/trunk@15631 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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scribu 2010-09-18 19:20:16 +00:00
parent ce723858c2
commit dea3a23691
1 changed files with 37 additions and 0 deletions
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37
wp-includes/taxonomy.php
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@ -2775,3 +2775,40 @@ function is_object_in_taxonomy($object_type, $taxonomy) {
return false; return false;
} }
/**
* Get an array of ancestor IDs for a given object.
*
* @param int $object_id The ID of the object
* @param string $object_type The type of object for which we'll be retrieving ancestors.
* @return array of ancestors from lowest to highest in the hierarchy.
*/
function get_ancestors($object_id = 0, $object_type = '') {
$object_id = (int) $object_id;
$ancestors = array();
if ( empty( $object_id ) ) {
return apply_filters('get_ancestors', $ancestors, $object_id, $object_type);
}
if ( is_taxonomy_hierarchical( $object_type ) ) {
$term = get_term($object_id, $object_type);
while ( ! is_wp_error($term) && ! empty( $term->parent ) && ! in_array( $term->parent, $ancestors ) ) {
$ancestors[] = (int) $term->parent;
$term = get_term($term->parent, $object_type);
}
} elseif ( null !== get_post_type_object( $object_type ) ) {
$object = get_post($object_id);
if ( ! is_wp_error( $object ) && isset( $object->ancestors ) && is_array( $object->ancestors ) )
$ancestors = $object->ancestors;
else {
while ( ! is_wp_error($object) && ! empty( $object->post_parent ) && ! in_array( $object->post_parent, $ancestors ) ) {
$ancestors[] = (int) $object->post_parent;
$object = get_post($object->post_parent);
}
}
}
return apply_filters('get_ancestors', $ancestors, $object_id, $object_type);
}