Class **Phalcon\\Cache\\Backend\\Memcache**
===========================================

*extends* abstract class :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

*implements* :doc:`Phalcon\\Cache\\BackendInterface <Phalcon_Cache_BackendInterface>`

.. role:: raw-html(raw)
   :format: html

:raw-html:`<a href="https://github.com/phalcon/cphalcon/blob/master/phalcon/cache/backend/memcache.zep" class="btn btn-default btn-sm">Source on GitHub</a>`

Allows to cache output fragments, PHP data or raw data to a memcache backend  This adapter uses the special memcached key "_PHCM" to store all the keys internally used by the adapter  

.. code-block:: php

    <?php

     use Phalcon\Cache\Backend\Memcache;
     use Phalcon\Cache\Frontend\Data as FrontData;
    
     // Cache data for 2 days
     $frontCache = new FrontData([
         'lifetime' => 172800
     ]);
    
     // Create the Cache setting memcached connection options
     $cache = new Memcache($frontCache, [
         'host' => 'localhost',
         'port' => 11211,
         'persistent' => false
     ]);
    
     // Cache arbitrary data
     $cache->save('my-data', [1, 2, 3, 4, 5]);
    
     // Get data
     $data = $cache->get('my-data');



Methods
-------

public  **__construct** (:doc:`Phalcon\\Cache\\FrontendInterface <Phalcon_Cache_FrontendInterface>` $frontend, [*array* $options])

Phalcon\\Cache\\Backend\\Memcache constructor



public  **_connect** ()

Create internal connection to memcached



public  **addServers** (*mixed* $host, *mixed* $port, [*mixed* $persistent])

Add servers to memcache pool



public  **get** (*mixed* $keyName, [*mixed* $lifetime])

Returns a cached content



public  **save** ([*int* | *string* $keyName], [*string* $content], [*long* $lifetime], [*boolean* $stopBuffer])

Stores cached content into the file backend and stops the frontend



public *boolean* **delete** (*int* | *string* $keyName)

Deletes a value from the cache by its key



public *array* **queryKeys** ([*string* $prefix])

Query the existing cached keys



public *boolean* **exists** ([*string* $keyName], [*long* $lifetime])

Checks if cache exists and it isn't expired



public *long* **increment** ([*string* $keyName], [*long* $value])

Increment of given $keyName by $value



public *long* **decrement** ([*string* $keyName], [*long* $value])

Decrement of $keyName by given $value



public  **flush** ()

Immediately invalidates all existing items.



public  **getFrontend** () inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

...


public  **setFrontend** (*mixed* $frontend) inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

...


public  **getOptions** () inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

...


public  **setOptions** (*mixed* $options) inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

...


public  **getLastKey** () inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

...


public  **setLastKey** (*mixed* $lastKey) inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

...


public *mixed* **start** (*int* | *string* $keyName, [*int* $lifetime]) inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

Starts a cache. The keyname allows to identify the created fragment



public  **stop** ([*mixed* $stopBuffer]) inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

Stops the frontend without store any cached content



public  **isFresh** () inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

Checks whether the last cache is fresh or cached



public  **isStarted** () inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

Checks whether the cache has starting buffering or not



public *int* **getLifetime** () inherited from :doc:`Phalcon\\Cache\\Backend <Phalcon_Cache_Backend>`

Gets the last lifetime set