function TermStorage::getAncestors

Returns all ancestors of this term.

@internal @todo Refactor away when TreeInterface is introduced.

Return value

\Drupal\taxonomy\TermInterface[] A list of ancestor taxonomy term entities keyed by term ID.

File

core/modules/taxonomy/src/TermStorage.php, line 177

Class

TermStorage

Defines a Controller class for taxonomy terms.

Namespace

Code

protected function getAncestors(TermInterface $term) {
    if (!isset($this->ancestors[$term->id()])) {
        $this->ancestors[$term->id()] = [
            $term->id() => $term,
        ];
        $search[] = $term->id();
        while ($tid = array_shift($search)) {
            foreach ($this->getParents(static::load($tid)) as $id => $parent) {
                if ($parent && !isset($this->ancestors[$term->id()][$id])) {
                    $this->ancestors[$term->id()][$id] = $parent;
                    $search[] = $id;
                }
            }
        }
    }
    return $this->ancestors[$term->id()];
}