/** * @return string * * This function will return the login url for the facebook API. Login url will changes based on given callback url */ public function loginUrl() { if (!$this->callBackUrl) { return ErrorHandler::error('empty_domain'); } if (!Config::checkValidDomain($this->callBackUrl)) { return ErrorHandler::error('invalid_domain'); } $loginUrl = $this->loginHelper->getLoginUrl($this->callBackUrl); if ($loginUrl) { return $loginUrl; } return ErrorHandler::error(); }