booth.php

<?php

// This is the new OpenStack name
$containerName = 'Keystone';

// This is the previous OpenStack name
$objectName = 'Pillar';

require 'vendor/autoload.php';

use OpenCloud\Rackspace;

// Initialize client
$client = new Rackspace(Rackspace::US_IDENTITY_ENDPOINT, array(
   'username' => 'rccc21',
   'apiKey'   => 'a952e2c3fb3745f2b1ecadd3f3dc55ae'
));

$service = $client->objectStoreService('cloudFiles', 'DFW');

// List and traverse over containers
$containers = $service->listContainers();

foreach ($containers as $_container) {
   if ($_container->getName() == $containerName) {
      $container = $_container;
      break;
   }
}

if (!isset($container)) {
   throw \Exception(sprintf("%s container not found!", $containerName));
}

// List and iterate over objects
$files = $container->objectList();

foreach ($files as $_file) {
   if ($_file->getName() == $objectName . '.txt') {
      $file = $_file;
      break;
   }
}

if (!isset($file)) {
   throw \Exception(sprintf("%s object not found", $objectName));
}

// Retrieve body
$file->refresh();

// Cast Guzzle\Http\EntityBody object to string
echo $file->getContent(), PHP_EOL;