csrfProtector::failedValidationAction PHP Method

        private static function failedValidationAction()
        {
            if (!file_exists(__DIR__ . "/../" . self::$config['logDirectory'])) {
                throw new logDirectoryNotFoundException("OWASP CSRFProtector: Log Directory Not Found!");
            }
            //call the logging function
            static::logCSRFattack();
            //#todo: ask mentors if $failedAuthAction is better as an int or string
            //default case is case 0
            switch (self::$config['failedAuthAction'][self::$requestType]) {
                case 0:
                    //send 403 header
                    header('HTTP/1.0 403 Forbidden');
                    exit("<h2>403 Access Forbidden by CSRFProtector!</h2>");
                    break;
                case 1:
                    //unset the query parameters and forward
                    if (self::$requestType === 'GET') {
                        $_GET = array();
                    } else {
                        $_POST = array();
                    }
                    break;
                case 2:
                    //redirect to custom error page
                    $location = self::$config['errorRedirectionPage'];
                    header("location: {$location}");
                case 3:
                    //send custom error message
                    exit(self::$config['customErrorMessage']);
                    break;
                case 4:
                    //send 500 header -- internal server error
                    header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error', true, 500);
                    exit("<h2>500 Internal Server Error!</h2>");
                    break;
                default:
                    //unset the query parameters and forward
                    if (self::$requestType === 'GET') {
                        $_GET = array();
                    } else {
                        $_POST = array();
                    }
                    break;
            }
        }