2 $pool = new \GuzzleHttp\Pool($client, $requests, [ 3 'concurrency' => 3, 4 'fulfilled' => function ($response, $index) use (&$twitterHandles) { 5 $user = json_decode($response->getBody(), true)['users'][0]; 6 $twitterHandles[] = $user['twitter_username']; 7 }, 8 'rejected' => function ($reason, $index) { 9 // handle error 10 }, 11 ]); Rob Allen ~ @akrabat