问Drupal 6-节点术语的父术语id

EN

else if (arg(0) == 'node' && is_numeric(arg(1)))) {
  $n = node_load(arg(1));
  $vid = 0; // change for the required vocabulary
  $tids = array(); // will hold all the parents of the node's terms

  foreach ($n->taxonomy as $tid => $term) {
    if ($term->vid == $vid) {
      $parents = taxonomy_get_parents($term->tid);

      // the term has a parent
      if (count($parents)) {
        $parent = array_shift($parents);
        $tids[] = $parent->tid;
        // if you require only one parent term, return the first one that we find
        // comment the next line if you want all terms that act as parents
        return $parent->tid;
      }
    }
  }
  // in this case, make sure that you 
  // check the 'Allow multiple terms per argument' checkbox 
  // and argument type is 'Term IDs separated by , or +'
  return implode(',', array_unique($tids));
}