/**
 * First parameter is for cookie "strictness"
 */
$cookieJar = new \GuzzleHttp\Cookie\CookieJar(true);
/**
  * Read in our cookies. In this case,they are coming From a
  * PSR7 compliant ServerRequestInterface such as Slim3
  */
$cookies = $request->getCookieParams();
/**
  * Now loop through the cookies adding them to the jar
  */
 foreach ($cookies as $cookie) {
           $newCookie =\GuzzleHttp\Cookie\SetCookie::fromString($cookie);
           /**
             * You can also do things such as $newCookie->setSecure(false);
            */
           $cookieJar->setCookie($newCookie);
 }
/**
 * Create a PSR7 guzzle request
 */
$guzzleRequest = new \GuzzleHttp\Psr7\Request(
                   $request->getmethod(),$url,$headers,$body
        );
 /**
  * Now actually PRepare Guzzle - here's where we hand over the
  * delicIoUs cookies!
  */
 $client = new \GuzzleHttp\Client(['cookies'=>$cookieJar]);
 /**
  * Now get the response
  */
 $guzzleResponse = $client->send($guzzleRequest,['timeout' => 5]);

以下是如何让它们再次出现：

$newCookies = $guzzleResponse->getHeader('set-cookie');

希望能帮助到你！