function taxonomy_get_children

7.x taxonomy.module taxonomy_get_children($tid, $vid = 0)
6.x taxonomy.module taxonomy_get_children($tid, $vid = 0, $key = 'tid')

Finds all children of a term ID.

Parameters

$tid: A taxonomy term ID.

$vid: An optional vocabulary ID to restrict the child search.

Return value

An array of term objects that are the children of the term $tid, or an empty array when no children exist.

2 calls to taxonomy_get_children()
TaxonomyTermTestCase::testTaxonomyTermHierarchy in drupal-7.x/modules/taxonomy/taxonomy.test
Test terms in a single and multiple hierarchy.
taxonomy_term_delete in drupal-7.x/modules/taxonomy/taxonomy.module
Delete a term.
1 string reference to 'taxonomy_get_children'
taxonomy_terms_static_reset in drupal-7.x/modules/taxonomy/taxonomy.module
Clear all static cache variables for terms.

File

drupal-7.x/modules/taxonomy/taxonomy.module, line 1062
Enables the organization of content into categories.

Code

function taxonomy_get_children($tid, $vid = 0) {
  $children = &drupal_static(__FUNCTION__, array());

  if ($tid && !isset($children[$tid])) {
    $query = db_select('taxonomy_term_data', 't');
    $query->join('taxonomy_term_hierarchy', 'h', 'h.tid = t.tid');
    $query->addField('t', 'tid');
    $query->condition('h.parent', $tid);
    if ($vid) {
      $query->condition('t.vid', $vid);
    }
    $query->addTag('term_access');
    $query->orderBy('t.weight');
    $query->orderBy('t.name');
    $tids = $query->execute()->fetchCol();
    $children[$tid] = taxonomy_term_load_multiple($tids);
  }

  return isset($children[$tid]) ? $children[$tid] : array();
}