Added code example

Author: Nyholm

components/cache.rst

@@ -202,7 +202,14 @@ and to ``unmarshall()``.
 
 The :class:`Symfony\\Component\\Cache\\Marshaller\\DefaultMarshaller` is using PHP's
 ``serialize()`` or ``igbinary_serialize()`` if the Igbinary extension is installed.
-There are other marshallers that will encrypt or compress the data before storing it.
+There are other marshallers that will encrypt or compress the data before storing it::
+
+    use Symfony\Component\Cache\Adapter\RedisAdapter;
+    use Symfony\Component\Cache\DefaultMarshaller;
+    use Symfony\Component\Cache\DeflateMarshaller;
+
+    $marshaller = new DeflateMarshaller(new DefaultMarshaller());
+    $cache = new RedisAdapter(new \Redis(), 'namespace', 0, $marshaller);
 
 Advanced Usage
 --------------