src/web/ViewAction.php
protected function resolveViewName()
    {
        $viewName = Yii::$app->request->get($this->viewParam, $this->defaultView);

        if (!is_string($viewName) || !preg_match('~^\w(?:(?!\/\.{0,2}\/)[\w\/\-\.])*$~', $viewName)) {
            if (YII_DEBUG) {
                throw new NotFoundHttpException("The requested view \"$viewName\" must start with a word character, must not contain /../ or /./, can contain only word characters, forward slashes, dots and dashes.");
            } else {
                throw new NotFoundHttpException(Yii::t('yii', 'The requested view "{name}" was not found.', ['name' => $viewName]));
            }
        }

        return empty($this->viewPrefix) ? $viewName : $this->viewPrefix . '/' . $viewName;
    }
protected function resolveViewName()
    {
        $viewName = Yii::$app->request->get($this->viewParam, $this->defaultView);

        if (!is_string($viewName) || !preg_match('~^\w(?:(?!\/\.{0,2}\/)[\w\/\-\.])*$~', $viewName)) {
            if (YII_DEBUG) {
                throw new NotFoundHttpException("The requested view \"$viewName\" must start with a word character, must not contain /../ or /./, can contain only word characters, forward slashes, dots and dashes.");
            } else {
                throw new NotFoundHttpException(Yii::t('yii', 'The requested view "{name}" was not found.', ['name' => $viewName]));
            }
        }

        return empty($this->viewPrefix) ? $viewName : $this->viewPrefix . '/' . $viewName;
    }
protected function resolveViewName ( ) { $ viewName = Yii :: $ app -> request -> get ( $ this -> viewParam , $ this -> defaultView ) ; if ( ! is_string ( $ viewName ) || ! preg_match ( '~^\w(?:(?!\/\.{0,2}\/)[\w\/\-\.])*$~' , $ viewName ) ) { if ( YII_DEBUG ) { throw new NotFoundHttpException ( "The requested view \"$viewName\" must start with a word character, must not contain /../ or /./, can contain only word characters, forward slashes, dots and dashes." ) ; } else { throw new NotFoundHttpException ( Yii :: t ( 'yii' , 'The requested view "{name}" was not found.' , [ 'name' => $ viewName ] ) ) ; } } return empty ( $ this -> viewPrefix ) ? $ viewName : $ this -> viewPrefix . '/' . $ viewName ; }
Resolves the view name currently being requested.

@return string the resolved view name
@throws NotFoundHttpException if the specified view name is invalid
Resolves the view name currently being requested .