setApplicationName("Client_Library_Examples"); $client->setDeveloperKey("AIzaSyBaJRWiXEAaFZtU0oJFzVYP4haGxXLFIP8"); $service = new Google_Service_YouTube_Video($client); $optParams = array('filter' => 'free-ebooks'); $results = $service->volumes->listVolumes('Henry David Thoreau', $optParams); foreach ($results as $item) { echo $item['volumeInfo']['title'], "
\n"; }