A custom Laravel 4.x cache connector for extending the default memcached driver to support AWS ElastiCache. It is missing the important part: the Cache::extend() instruction. I've blogged the whole thing at blog.hapnic.com/2013/09/11/Laravel-4-and-ElastiCache/

ElasticacheConnector.php

<?php namespace Illuminate\Cache;

use Memcached;

class ElasticacheConnector {

  /**
	 * Create a new Memcached connection.
	 *
	 * @param array  $servers
	 * @return \Memcached
	 */
	public function connect(array $servers)
	{
		$memcached = $this->getMemcached();

		// Set Elasticache options here
		if (defined('\Memcached::OPT_CLIENT_MODE') && defined('\Memcached::DYNAMIC_CLIENT_MODE')) {
			$memcache->setOption(\Memcached::OPT_CLIENT_MODE, \Memcached::DYNAMIC_CLIENT_MODE);
		}

		// For each server in the array, we'll just extract the configuration and add
		// the server to the Memcached connection. Once we have added all of these
		// servers we'll verify the connection is successful and return it back.
		foreach ($servers as $server)
		{
			$memcached->addServer($server['host'], $server['port'], $server['weight']);
		}

		if ($memcached->getVersion() === false)
		{
			throw new \RuntimeException("Could not establish Memcached connection.");
		}

		return $memcached;
	}

	/**
	 * Get a new Memcached instance.
	 *
	 * @return \Memcached
	 */
	protected function getMemcached()
	{
		return new Memcached;
	}

}