SimpleSAML_Error_Error::setHTTPCode PHP Method

    protected function setHTTPCode()
    {
        // Some mostly used HTTP codes
        $httpCodesMap = array(400 => 'HTTP/1.0 400 Bad Request', 403 => 'HTTP/1.0 403 Forbidden', 404 => 'HTTP/1.0 404 Not Found', 405 => 'HTTP/1.0 405 Method Not Allowed', 500 => 'HTTP/1.0 500 Internal Server Error', 501 => 'HTTP/1.0 501 Method Not Implemented', 503 => 'HTTP/1.0 503 Service Temporarily Unavailable');
        $httpCode = $this->httpCode;
        if (function_exists('http_response_code')) {
            http_response_code($httpCode);
            return;
        }
        if (!array_key_exists($this->httpCode, $httpCodesMap)) {
            $httpCode = 500;
            SimpleSAML\Logger::warning('HTTP response code not defined: ' . var_export($this->httpCode, true));
        }
        header($httpCodesMap[$httpCode]);
    }