public function FileSystem::validScheme

public FileSystem::validScheme($scheme)

Checks that the scheme of a stream URI is valid.

Confirms that there is a registered stream handler for the provided scheme and that it is callable. This is useful if you want to confirm a valid scheme without creating a new instance of the registered handler.

Parameters

string $scheme: A URI scheme, a stream is referenced as "scheme://target".

Return value

bool Returns TRUE if the string is the name of a validated stream, or FALSE if the scheme does not have a registered handler.

Overrides FileSystemInterface::validScheme

File

core/lib/Drupal/Core/File/FileSystem.php, line 295

Class

FileSystem

Provides helpers to operate on files and stream wrappers.

Namespace

Drupal\Core\File

Code

public function validScheme($scheme) {
  if (!$scheme) {
    return FALSE;
  }
  return class_exists($this->streamWrapperManager->getClass($scheme));
}