function field_available_languages

Collects the available languages for the given entity type and field.

If the given field has language support enabled, an array of available languages will be returned, otherwise only LANGUAGE_NONE will be returned. Since the default value for a 'translatable' entity property is FALSE, we ensure that only entities that are able to handle translations actually get translatable fields.

Parameters

$entity_type: The type of the entity the field is attached to, e.g. 'node' or 'user'.

$field: A field structure.

Return value

An array of valid language codes.:

Related topics

File

core/modules/field/field.multilingual.inc, line 102

Functions implementing Field API multilingual support.

Code

function field_available_languages($entity_type, $field) {
  static $backdrop_static_fast;
  if (!isset($backdrop_static_fast)) {
    $backdrop_static_fast['field_languages'] = &backdrop_static(__FUNCTION__);
  }
  $field_languages = &$backdrop_static_fast['field_languages'];
  $field_name = $field['field_name'];

  if (!isset($field_languages[$entity_type][$field_name])) {
    // If the field has language support enabled we retrieve an (alterable) list
    // of enabled languages, otherwise we return just LANGUAGE_NONE.
    if (field_is_translatable($entity_type, $field)) {
      $languages = field_content_languages();
      // Let other modules alter the available languages.
      $context = array('entity_type' => $entity_type, 'field' => $field);
      backdrop_alter('field_available_languages', $languages, $context);
      $field_languages[$entity_type][$field_name] = $languages;
    }
    else {
      $field_languages[$entity_type][$field_name] = array(LANGUAGE_NONE);
    }
  }

  return $field_languages[$entity_type][$field_name];
}