PayPal\Auth\Oauth\OAuthRequest::to_header PHP Метод

    public function to_header($realm = null)
    {
        $first = true;
        if ($realm) {
            $out = 'Authorization: OAuth realm="' . OAuthUtil::urlencode_rfc3986($realm) . '"';
            $first = false;
        } else {
            $out = 'Authorization: OAuth';
        }
        $total = array();
        foreach ($this->parameters as $k => $v) {
            if (substr($k, 0, 5) != "oauth") {
                continue;
            }
            if (is_array($v)) {
                throw new OAuthException('Arrays not supported in headers');
            }
            $out .= $first ? ' ' : ',';
            $out .= OAuthUtil::urlencode_rfc3986($k) . '="' . OAuthUtil::urlencode_rfc3986($v) . '"';
            $first = false;
        }
        return $out;
    }