Simple useage of GuzzleHttps request pools for concurrently running HTTP requests and returning responses for processing.

Using PHP GuzzleHttp Request Pools

//One liner to batch an array of request objects
        var_dump(Pool::batch($this->client, [$dropboxRequest, $quizRequest]));
        die;


// Apply a function on fulfilled/rejected promises
// Mind the scope of the anonymous functions
        $responses = [];
        $errors = [];
        $pool = new Pool($client, [$dropboxRequest, $quizRequest], [
            'rejected' => function ($reason, $index) use (&$errors) {
                return $errors[$index] = $reason;
            },
            'fulfilled' => function($response, $index) use (&$responses) {
                return $responses[$index] = $response;
            }
        ]);
        // Initiate the transfers and create a promise
        $promise = $pool->promise();
        // Wait for the promise to resolve
        $promise->wait();
        var_dump($responses, $errors, $promise);
        die;