public function StreamWrapperManager::isValidScheme in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php \Drupal\Core\StreamWrapper\StreamWrapperManager::isValidScheme()
2. 10 core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php \Drupal\Core\StreamWrapper\StreamWrapperManager::isValidScheme()

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 StreamWrapperManagerInterface::isValidScheme

2 calls to StreamWrapperManager::isValidScheme()

StreamWrapperManager::isValidUri in core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php

Determines whether the URI has a valid scheme for file API operations.

StreamWrapperManager::normalizeUri in core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php

Normalizes a URI by making it syntactically correct.

File

core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php, line 267

Class

StreamWrapperManager

Provides a StreamWrapper manager.

Namespace

Drupal\Core\StreamWrapper

Code

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