How to override error handler from a module - error-handling

Question

To override error handler from a module based this samdark guid:
class Module extends \yii\base\Module
{
public function init()
{
parent::init();
\Yii::configure($this, [
'components' => [
'errorHandler' => [
'class' => ErrorHandler::className(),
]
],
]);
/** #var ErrorHandler $handler */
$handler = $this->get('errorHandler');
\Yii::$app->set('errorHandler', $handler);
$handler->register();
}
}
This method only worked for valid module controllers, but can not handle invalid module controllers. Even affects all over the application so that module error handler will be default error handler all over the application. i was confused how can solve it!
Example: I was willing www.site.com/module/x handled with module error handler(www.site.com/module/default/error),where x is not a valid module controller. If that was not the case, it was handled with app error handler(www.site.com/site/error).
Finally i used this code: (admin is my module name). Know everything is fine.
class AdminModule extends \yii\base\Module
{
public function init()
{
parent::init();
// Is better used regex method, temporally i used this method
$r = Yii::$app->urlManager->parseRequest(Yii::$app->request)[0];
$r_array = explode('/',$r);
if($r_array[0] === 'admin'){
Yii::configure($this, [
'components' => [
'errorHandler' => [
'class' => ErrorHandler::className(),
'errorAction' => '/admin/default/error',
]
],
]);
$handler = $this->get('errorHandler');
Yii::$app->set('errorHandler', $handler);
$handler->register();
}
}
}
If you know a better way please share with me. Thanks