acknowledgeBatch() public method

Use {@see \Google\Cloud\PubSub\Subscription::acknowledge()} to acknowledge a single message. Example: $messages = $subscription->pull(); $messagesArray = iterator_to_array($messages); $subscription->acknowledgeBatch($messagesArray);
See also: https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.subscriptions/acknowledge Acknowledge Message
public acknowledgeBatch ( array $messages, array $options = [] ) : void
$messages array An array of messages
$options array Configuration Options
return void
 public function __construct(Subscription $subscription, $job, LoggerInterface $logger)
 {
     // [START callback]
     $callback = function ($response) use($job, $subscription, $logger) {
         $ackIds = [];
         $messages = json_decode($response->getBody(), true);
         if (isset($messages['receivedMessages'])) {
             foreach ($messages['receivedMessages'] as $message) {
                 $attributes = $message['message']['attributes'];
                 $logger->info(sprintf('Message received for book ID "%s" ', $attributes['id']));
                 // Do the actual work in the LookupBookDetailsJob class
                 $job->work($attributes['id']);
                 $ackIds[] = $message['ackId'];
             }
         }
         // Acknowledge the messsages have been handled
         if (!empty($ackIds)) {
             $subscription->acknowledgeBatch($ackIds);
         }
     };
     // [END callback]
     $this->callback = $callback;
     $this->subscription = $subscription;
     $this->connection = new AsyncConnection();
 }
 public function testAcknowledgeBatch()
 {
     $ackIds = ['foobar', 'otherAckId'];
     $this->connection->acknowledge(Argument::that(function ($args) use($ackIds) {
         if ($args['foo'] !== 'bar') {
             return false;
         }
         if ($args['ackIds'] !== $ackIds) {
             return false;
         }
         return true;
     }))->shouldBeCalledTimes(1);
     $subscription = new Subscription($this->connection->reveal(), 'subscription-name', 'topic-name', 'project-id');
     $subscription->acknowledgeBatch($ackIds, ['foo' => 'bar']);
 }