function taxonomy_get_children

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.

3 calls to taxonomy_get_children()
TaxonomyQueryAlterTestCase::testTaxonomyQueryAlter in drupal/modules/taxonomy/taxonomy.test
Tests that appropriate tags are added when querying the database.
TaxonomyTermTestCase::testTaxonomyTermHierarchy in drupal/modules/taxonomy/taxonomy.test
Test terms in a single and multiple hierarchy.
taxonomy_term_delete in drupal/modules/taxonomy/taxonomy.module
Delete a term.
1 string reference to 'taxonomy_get_children'
taxonomy_terms_static_reset in drupal/modules/taxonomy/taxonomy.module
Clear all static cache variables for terms.

File

drupal/modules/taxonomy/taxonomy.module, line 1073
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('taxonomy_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();
}