1

I've used field_info_instances function to retrieve all fields info under a content type.

field_info_instances('$entity_type','$bundle_name').

As from API page,

  1. If $entity_type is not set, return all instances keyed by entity type and bundle name.
  2. If $entity_type is set, return all instances for that entity type, keyed by bundle name.
  3. If $entity_type and $bundle_name are set, return all instances for that bundle.

I didn't get the third point here. what is the default order for return output by file_info_instances when $entity_type and $bundle_name given.

Any idea?

1

This is the query run by field_read_instances():

$query = db_select('field_config_instance', 'fci', array('fetch' => PDO::FETCH_ASSOC));

$query->join('field_config', 'fc', 'fc.id = fci.field_id');
$query->fields('fci');

// Turn the conditions into a query.
foreach ($params as $key => $value) {
  $query->condition('fci.' . $key, $value);
}
if (!$include_inactive) {
  $query->condition('fc.active', 1)->condition('fc.storage_active', 1);
}
if (!$include_deleted) {
  $query->condition('fc.deleted', 0);
  $query->condition('fci.deleted', 0);
}

$instances = array();
$results = $query->execute();

So it's safe to say there's no default order for field instances; they'll be in whatever order they went into the database, or perhaps different depending on your DBMS and settings.

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