# Class **Phalcon\Cache\Backend\Redis**[](# "永久链接至标题") *extends* abstract class [*Phalcon\Cache\Backend*](#) *implements*[*Phalcon\Cache\BackendInterface*](#) Allows to cache output fragments, PHP data or raw data to a redis backend This adapter uses the special redis key “_PHCR” to store all the keys internally used by the adapter ~~~ <?php // Cache data for 2 days $frontCache = new \Phalcon\Cache\Frontend\Data(array( "lifetime" => 172800 )); //Create the Cache setting redis connection options $cache = new Phalcon\Cache\Backend\Redis($frontCache, array( 'host' => 'localhost', 'port' => 6379, 'auth' => 'foobared', 'persistent' => false )); //Cache arbitrary data $cache->save('my-data', array(1, 2, 3, 4, 5)); //Get data $data = $cache->get('my-data'); ~~~ ### Methods[](# "永久链接至标题") public **__construct** ([*Phalcon\Cache\FrontendInterface*](#) $frontend, [*array* $options]) Phalcon\Cache\Backend\Redis constructor public **_connect** () Create internal connection to redis public *mixed***get** (*int|string* $keyName, [*long* $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], [*unknown* $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 Phalcon\Cache\Backend ... public **setFrontend** (*unknown* $frontend) inherited from Phalcon\Cache\Backend ... public **getOptions** () inherited from Phalcon\Cache\Backend ... public **setOptions** (*unknown* $options) inherited from Phalcon\Cache\Backend ... public **getLastKey** () inherited from Phalcon\Cache\Backend ... public **setLastKey** (*unknown* $lastKey) inherited from Phalcon\Cache\Backend ... public *mixed***start** (*int|string* $keyName, [*int* $lifetime]) inherited from Phalcon\Cache\Backend Starts a cache. The keyname allows to identify the created fragment public **stop** ([*unknown* $stopBuffer]) inherited from Phalcon\Cache\Backend Stops the frontend without store any cached content public **isFresh** () inherited from Phalcon\Cache\Backend Checks whether the last cache is fresh or cached public **isStarted** () inherited from Phalcon\Cache\Backend Checks whether the cache has starting buffering or not public *int***getLifetime** () inherited from Phalcon\Cache\Backend Gets the last lifetime set | - [索引](# "总目录") - [下一页](# "Class Phalcon\Cache\Backend\Xcache") | - [上一页](# "Class Phalcon\Cache\Backend\Mongo") | - [API Indice](#) »