/**
* Returns the url to the file.
*
* @return string
*/
public function url()
{
$protocol = $this->protocol();
if ($protocol == 'http' || $protocol == 'https' || $protocol == 'ftp') {
return $this->path;
} elseif ($protocol != '') {
throw new Exception("Unable to get URL to file '{$this->_path}'. The {$protocol} protocol is not supported in browsers.");
}
return $this->withRootAs(Fs::document_root());
}
