StreamWrapperManager::unregister

public StreamWrapperManager::unregister()

public function unregister() {
  // Normally, there are definitely wrappers set for the ALL filter. However,
  // in some cases involving many container rebuilds (e.g. WebTestBase),
  // $this->wrappers may be empty although wrappers are still registered
  // globally. Thus an isset() check is needed before iterating.
  if (isset($this->wrappers[StreamWrapperInterface::ALL])) {
    foreach (array_keys($this->wrappers[StreamWrapperInterface::ALL]) as $scheme) {
      stream_wrapper_unregister($scheme);
    }
  }
}