function file_stream_wrapper_valid_scheme
7.x file.inc | file_stream_wrapper_valid_scheme($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
$scheme: A URI scheme, a stream is referenced as "scheme://target".
Return value
Returns TRUE if the string is the name of a validated stream, or FALSE if the scheme does not have a registered handler.
Related topics
13 calls to file_stream_wrapper_valid_scheme()
- drupal_dirname in drupal-7.x/
includes/ file.inc - Gets the name of the directory from a given path.
- drupal_rmdir in drupal-7.x/
includes/ file.inc - Removes a directory.
- drupal_tempnam in drupal-7.x/
includes/ file.inc - Creates a file with a unique filename in the specified directory.
- drupal_unlink in drupal-7.x/
includes/ file.inc - Deletes a file.
- file_download in drupal-7.x/
includes/ file.inc - Menu handler for private file transfers.
File
- drupal-7.x/
includes/ file.inc, line 218 - API for handling file uploads and server file management.
Code
function file_stream_wrapper_valid_scheme($scheme) {
// Does the scheme have a registered handler that is callable?
$class = file_stream_wrapper_get_class($scheme);
if (class_exists($class)) {
return TRUE;
}
else {
return FALSE;
}
}