OneLogin_Saml2_Utils::getRawHost PHP Method

    protected static function getRawHost()
    {
        if (self::$_host) {
            $currentHost = self::$_host;
        } elseif (self::getProxyVars() && array_key_exists('HTTP_X_FORWARDED_HOST', $_SERVER)) {
            $currentHost = $_SERVER['HTTP_X_FORWARDED_HOST'];
        } elseif (array_key_exists('HTTP_HOST', $_SERVER)) {
            $currentHost = $_SERVER['HTTP_HOST'];
        } elseif (array_key_exists('SERVER_NAME', $_SERVER)) {
            $currentHost = $_SERVER['SERVER_NAME'];
        } else {
            if (function_exists('gethostname')) {
                $currentHost = gethostname();
            } else {
                $currentHost = php_uname("n");
            }
        }
        return $currentHost;
    }