12

I have a node and want to get all the taxonomy terms assigned to the node.

In drupal 6 I could use $node->taxonomy and the taxonomy_* functions but these don't exist in drupal 7.

20

Taxonomy terms are implemented in fields in Drupal 7. Assuming you have defined a taxonomy field named field_category for your content type, you can access it as:

$language = 'und'; // or will be provided by some Drupal hooks
foreach ($node->field_category[$language] as $delta => $value) {
  $term = taxonomy_term_load($value['tid']);
}

If you don't have access to the field name, probably the easiest way for nodes is to query the database directly:

$results = db_query('SELECT tid FROM {taxonomy_index} WHERE nid = :nid', array(':nid' => $node->nid));
foreach ($results as $result) {
  $term = taxonomy_term_load($result->tid);
}

Keep in mind though, that you may end up dealing a jumble of terms from different vocabularies if you have more than one taxonomy field.

  • What if I don't know the taxonomy field name? The names will differ between content types and I want to get all of the terms for any node. – Rwky Aug 7 '11 at 15:44
  • 1
    Added a method if you don't know the field name. – keithm Aug 7 '11 at 16:02
  • 4
    Especially in the second version, you can use taxonomy_term_load_multiple($results->fetchCol()); to load the terms in a single query. – Berdir Nov 19 '11 at 11:29
  • 1
    Oh, and you can use field_get_items('node', $node, 'field_category') to get the fields in the correct language. – Berdir Nov 19 '11 at 11:32
  • Note the select from taxonomy_index technique works only with published nodes. That table is not maintained for unpublished content. – Dave Cohen Dec 7 '13 at 13:59
2

Here's a very generic way to grab all terms without specifying field names and no db_query:

function example_get_terms($node) {
  $terms = array();

  foreach (field_info_instances('node', $node->type) as $fieldname => $info) {
    foreach (field_get_items('node', $node, $fieldname) as $item) {
      if (is_array($item) && !empty($item['tid']) && $term = taxonomy_term_load($item['tid'])) {
        $terms[] = $term->name;
      }
    }
  }
  return $terms;
}
  • For Drupal beginner, i would add if (arg(0) == 'node' && is_numeric(arg(1))) {$nid = arg(1);} to get the nid and $node = node_load($nid); in order to make your function work. – Sébastien Gicquel Apr 7 '17 at 8:40

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