file_stream_wrapper_valid_scheme
function file_stream_wrapper_valid_scheme
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
$scheme: A URI scheme, a stream is referenced as "scheme://target".
Return value
Returns TRUE if the string is the name of a validated stream, or FALSE if the scheme does not have a registered handler.
Related topics
File
- includes/file.inc, line 218
- API for handling file uploads and server file management.
Code
function file_stream_wrapper_valid_scheme($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; } }
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https://api.drupal.org/api/drupal/includes!file.inc/function/file_stream_wrapper_valid_scheme/7.x