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<?php namespace Illuminate\Cache;

class MemcachedStore extends TaggableStore implements StoreInterface {

/**
	 * The Memcached instance.
	 *
	 * @var \Memcached
	 */
	protected $memcached;

/**
	 * A string that should be prepended to keys.
	 *
	 * @var string
	 */
	protected $prefix;

/**
	 * Create a new Memcached store.
	 *
	 * @param  \Memcached  $memcached
	 * @param  string      $prefix
	 * @return void
	 */
	public function __construct($memcached, $prefix = '')
	{
		$this->memcached = $memcached;
		$this->prefix = strlen($prefix) > 0 ? $prefix.':' : '';
	}

/**
	 * Retrieve an item from the cache by key.
	 *
	 * @param  string  $key
	 * @return mixed
	 */
	public function get($key)
	{
		$value = $this->memcached->get($this->prefix.$key);

if ($this->memcached->getResultCode() == 0)
		{
			return $value;
		}
	}

/**
	 * Store an item in the cache for a given number of minutes.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @param  int     $minutes
	 * @return void
	 */
	public function put($key, $value, $minutes)
	{
		$this->memcached->set($this->prefix.$key, $value, $minutes * 60);
	}

/**
	 * Increment the value of an item in the cache.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @return int|bool
	 */
	public function increment($key, $value = 1)
	{
		return $this->memcached->increment($this->prefix.$key, $value);
	}

/**
	 * Decrement the value of an item in the cache.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @return int|bool
	 */
	public function decrement($key, $value = 1)
	{
		return $this->memcached->decrement($this->prefix.$key, $value);
	}

/**
	 * Store an item in the cache indefinitely.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @return void
	 */
	public function forever($key, $value)
	{
		return $this->put($key, $value, 0);
	}

/**
	 * Remove an item from the cache.
	 *
	 * @param  string  $key
	 * @return void
	 */
	public function forget($key)
	{
		$this->memcached->delete($this->prefix.$key);
	}

/**
	 * Remove all items from the cache.
	 *
	 * @return void
	 */
	public function flush()
	{
		$this->memcached->flush();
	}

/**
	 * Get the underlying Memcached connection.
	 *
	 * @return \Memcached
	 */
	public function getMemcached()
	{
		return $this->memcached;
	}

/**
	 * Get the cache key prefix.
	 *
	 * @return string
	 */
	public function getPrefix()
	{
		return $this->prefix;
	}

}

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