public function getScriptUrl()
{
if ($this->_scriptUrl === null) {
$request = Yii::$app->getRequest();
if ($request instanceof Request) {
$this->_scriptUrl = $request->getScriptUrl();
} else {
throw new InvalidConfigException('Please configure UrlManager::scriptUrl correctly as you are running a console application.');
}
}
return $this->_scriptUrl;
}