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 $scheme: A URI scheme, a stream is referenced as "scheme://target".
Return value
bool Returns TRUE if the string is the name of a validated stream, or FALSE if the scheme does not have a registered handler.
Overrides FileSystemInterface::validScheme
File
- core/lib/Drupal/Core/File/FileSystem.php, line 295
Class
- FileSystem
- Provides helpers to operate on files and stream wrappers.
Namespace
Drupal\Core\FileCode
public function validScheme($scheme) { if (!$scheme) { return FALSE; } return class_exists($this->streamWrapperManager->getClass($scheme)); }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!File!FileSystem.php/function/FileSystem::validScheme/8.1.x