/** * Return the name of the requested page * * @param array $requestData The request's data * * @return null|string The name of the requested page or null in case no page has been requested */ protected function getRequestedPage(array $requestData) { if ($this->parent) { return $this->parent->getRequestedPage($requestData); } if (isset($requestData[static::BTN_NEXT])) { return $requestData[static::BTN_NEXT]; } elseif (isset($requestData[static::BTN_PREV])) { return $requestData[static::BTN_PREV]; } }