banker/src/Driver/MemcachedDriver.php

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<?php
/**
* Banker
*
* A Caching library implementing psr/cache
*
* PHP version 5.6
*
* @package Banker
* @author Timothy J. Warren <tim@timshomepage.net>
* @copyright 2016 Timothy J. Warren
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @version 1.0.0
* @link https://git.timshomepage.net/timw4mail/banker
*/
namespace Aviat\Banker\Driver;
use Aviat\Banker\Exception\CacheException;
use Memcached;
use MemcachedException;
/**
* Memcached cache backend
*/
class MemcachedDriver extends Driver {
/**
* Driver for PHP Memcache extension
*
* @param array $config
* @throws CacheException
*/
public function __construct(array $config = [])
{
if ( ! class_exists('Memcached'))
{
throw new CacheException("Memcached driver requires memcached extensions");
}
$this->conn = new Memcached();
$this->conn->addServer($config['host'], $config['port']);
}
/**
* Disconnect from memcached server
*/
public function __destruct()
{
$this->conn->quit();
}
/**
* See if a key currently exists in the cache
*
* @param string $key
* @return bool
*/
public function exists($key)
{
return $this->conn->get($key) !== FALSE;
}
/**
* Get the value for the selected cache key
*
* @param string $key
* @return mixed
*/
public function get($key)
{
return $this->conn->get($key);
}
/**
* Retrieve a set of values by their cache key
*
* @param string[] $keys
* @return array
*/
public function getMultiple(array $keys = [])
{
return $this->conn->getMulti($keys);
}
/**
* Set a cached value
*
* @param string $key
* @param mixed $value
* @param int $expires
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* @return DriverInterface
*/
public function set($key, $value, $expires = 0)
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{
$this->conn->set($key, $value, $expires);
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return $this;
}
/**
* Remove an item from the cache
*
* @param string $key
* @return boolean
*/
public function delete($key)
{
return $this->conn->delete($key);
}
/**
* Remove multiple items from the cache
*
* @param string[] $keys
* @return boolean
*/
public function deleteMultiple(array $keys = [])
{
return $this->conn->deleteMulti($keys);
}
/**
* Empty the cache
*
* @return boolean
*/
public function flush()
{
return $this->conn->flush();
}
}