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* This file is part of the Symfony package.
* (c) Fabien Potencier <>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
namespace Symfony\Component\Cache\Adapter;
use Symfony\Component\Cache\Marshaller\MarshallerInterface;
use Symfony\Component\Cache\Traits\MemcachedTrait;
class MemcachedAdapter extends AbstractAdapter
use MemcachedTrait;
protected $maxIdLength = 250;
* Using a MemcachedAdapter with a TagAwareAdapter for storing tags is discouraged.
* Using a RedisAdapter is recommended instead. If you cannot do otherwise, be aware that:
* - the Memcached::OPT_BINARY_PROTOCOL must be enabled
* (that's the default when using MemcachedAdapter::createConnection());
* - tags eviction by Memcached's LRU algorithm will break by-tags invalidation;
* your Memcached memory should be large enough to never trigger LRU.
* Using a MemcachedAdapter as a pure items store is fine.
public function __construct(\Memcached $client, string $namespace = '', int $defaultLifetime = 0, MarshallerInterface $marshaller = null)
$this->init($client, $namespace, $defaultLifetime, $marshaller);