1 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
$scheme: A URI scheme, a stream is referenced as "scheme://target".
Return value
Returns TRUE if the string is the name of a validated stream,: or FALSE if the scheme does not have a registered handler.
Related topics
File
- core/
includes/ file.inc, line 217 - API for handling file uploads and server file management.
Code
function file_stream_wrapper_valid_scheme($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;
}
}