field_sync_field_status() Update the field_config table to indicate that field types and storage types defined by enabled modules are active, and those defined by disabled modules are not active. Read more about field_sync_field_status()
field_modules_enabled($modules) Implements hook_modules_enabled() for the field module Read more about field_modules_enabled($modules)
field_modules_disabled($modules) Implements hook_modules_disabled() for the field module. Read more about field_modules_disabled($modules)
field_flush_caches() Implements hook_flush_caches() for the field module. Read more about field_flush_caches()