use Apix\Cache;

  $backend = new \Redis();
  // $backend = 'apc';
  // $backend = new \PDO('...');

  $pool = Cache\Factory::getPool($backend); // without tagging support
  // or $pool = Cache\Factory::getTaggablePool($backend); // with tagging!
  
  $item = $pool->getItem('wibble_id');
  
  if (!$item->exists()) {
    $data = compute_expensive_stuff();
    $item->set($data);
    $pool->save($item);
  }

  return $item->get();

  use Apix\Cache;

  $cache = new Cache\Apc;

  // try to retrieve 'wibble_id' from the cache
  if (!$data = $cache->load('wibble_id')) {
    
    // otherwise, get some data from the origin
    // example of arbitrary mixed data
    $data = array('foo' => 'bar');

    // and save it to the cache
    $cache->save($data, 'wibble_id');
  }

  // save $data to the cache as 'wobble_id',
  // tagging it along the way as 'baz' and 'flob',
  // and set the ttl to 300 seconds (5 minutes)
  $cache->save($data, 'wobble_id', array('baz', 'flob'), 300);

  // retrieve all the cache ids under the tag 'baz'
  $ids = $cache->loadTag('baz');

  // clear out all items with a 'baz' tag
  $cache->clean('baz');

  // remove the named item
  $cache->delete('wibble_id');

  // flush out the cache (of all -your- stored items)
  $cache->flush();

  use Apix\Cache;
  
  // default options
  $options = array(
      'prefix_key'  => 'apix-cache-key:', // prefix cache keys
      'prefix_tag'  => 'apix-cache-tag:', // prefix cache tags
      'tag_enable'  => true               // wether to enable tags support
  );

  // start APC as a local cache
  $local_cache = new Cache\Apc($options);

  // additional (default) options
  $options['atomicity']  = false;    // false is faster, true is guaranteed
  $options['serializer'] = 'php';    // null, php, igbinary and json

  $redis_client = new \Redis;        // instantiate phpredis*
  $distributed_cache = new Cache\Redis($redis_client, $options);

  // additional (default) options
  $options['object_serializer'] = 'php';  // null, json, php, igBinary
  $options['db_name'] = 'apix';           // name of the mongo db
  $options['collection_name'] = 'cache';  // name of the mongo collection

  $mongo  = new \MongoClient;             // MongoDB native driver** instance
  $cache = new Cache\Mongo($mongo, $options);

  // additional (default) options, specific to Memcached
  $options['prefix_key'] = 'key_';  // prefix cache keys
  $options['prefix_tag'] = 'tag_';  // prefix cache tags
  $options['prefix_idx'] = 'idx_';  // prefix cache indexes
  $options['prefix_nsp'] = 'nsp_';  // prefix cache namespaces
  $options['serializer'] = 'php';   // null, php, json, igbinary.

  $memcached  = new \Memcached;     // a Memcached instance
  $shared_cache = new Cache\Memcached($memcached, $options);

  // additional (default) options, specific to the PDO backends
  $options['db_table']   = 'cache';       // table to hold the cache
  $options['serializer'] = 'php';         // null, php, igbinary, json
  $options['preflight']  = true;          // wether to preflight the DB
  $options['timestamp']  = 'Y-m-d H:i:s'; // the timestamp DB format

  // with SQLITE
  $dbh = new \PDO('sqlite:/tmp/apix_tests.sqlite3');
  $relational_cache = new Cache\Pdo\Sqlite($dbh, $options);

  // with MYSQL, MariaDB and Percona
  $dbh = new \PDO('mysql:host=xxx;port=xxx;dbname=xxx', 'user', 'pass');
  $mysql_cache = new Cache\Pdo\Mysql($dbh, $options);

  // with PGSQL
  $dbh = new \PDO('pgsql:dbname=xxx;host=xxx', 'xxx', 'xxx');
  $postgres_cache = new Cache\Pdo\Pgsql($dbh, $options);

  // with a SQL:1999 compliant DB, e.g. Oracle
  $dbh = new \PDO('oci:dbname=xxx', 'xxx', 'xxx');
  $sql1999_cache = new Cache\Pdo\Sql1999($dbh, $options);

  // additional (default) options
  $options['directory'] = sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'apix-cache';
  
  $files_cache = new Cache\Files($options);
  // or
  $directory_cache = new Cache\Directory($options);