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261 lines
6.6 KiB
261 lines
6.6 KiB
Introduction
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============
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Doctrine Cache is a library that provides an interface for caching data.
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It comes with implementations for some of the most popular caching data
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stores. Here is what the ``Cache`` interface looks like.
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.. code-block:: php
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namespace Doctrine\Common\Cache;
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interface Cache
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{
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public function fetch($id);
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public function contains($id);
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public function save($id, $data, $lifeTime = 0);
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public function delete($id);
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public function getStats();
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}
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Here is an example that uses Memcache.
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.. code-block:: php
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use Doctrine\Common\Cache\MemcacheCache;
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$memcache = new Memcache();
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$cache = new MemcacheCache();
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$cache->setMemcache($memcache);
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$cache->set('key', 'value');
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echo $cache->get('key') // prints "value"
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Drivers
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=======
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Doctrine ships with several common drivers that you can easily use.
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Below you can find information about all the available drivers.
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ApcCache
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--------
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The ``ApcCache`` driver uses the ``apc_fetch``, ``apc_exists``, etc. functions that come
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with PHP so no additional setup is required in order to use it.
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.. code-block:: php
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$cache = new ApcCache();
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ApcuCache
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---------
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The ``ApcuCache`` driver uses the ``apcu_fetch``, ``apcu_exists``, etc. functions that come
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with PHP so no additional setup is required in order to use it.
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.. code-block:: php
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$cache = new ApcuCache();
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ArrayCache
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----------
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The ``ArrayCache`` driver stores the cache data in PHPs memory and is not persisted anywhere.
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This can be useful for caching things in memory for a single process when you don't need
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the cache to be persistent across processes.
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.. code-block:: php
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$cache = new ArrayCache();
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ChainCache
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----------
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The ``ChainCache`` driver lets you chain multiple other drivers together easily.
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.. code-block:: php
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$arrayCache = new ArrayCache();
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$apcuCache = new ApcuCache();
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$cache = new ChainCache([$arrayCache, $apcuCache]);
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CouchbaseBucketCache
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--------------------
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The ``CouchbaseBucketCache`` driver uses Couchbase to store the cache data.
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.. code-block:: php
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$bucketName = 'bucket-name';
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$authenticator = new Couchbase\PasswordAuthenticator();
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$authenticator->username('username')->password('password');
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$cluster = new CouchbaseCluster('couchbase://127.0.0.1');
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$cluster->authenticate($authenticator);
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$bucket = $cluster->openBucket($bucketName);
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$cache = new CouchbaseBucketCache($bucket);
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FilesystemCache
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---------------
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The ``FilesystemCache`` driver stores the cache data on the local filesystem.
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.. code-block:: php
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$cache = new FilesystemCache('/path/to/cache/directory');
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MemcacheCache
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-------------
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The ``MemcacheCache`` drivers stores the cache data in Memcache.
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.. code-block:: php
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$memcache = new Memcache();
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$memcache->connect('localhost', 11211);
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$cache = new MemcacheCache();
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$cache->setMemcache($memcache);
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MemcachedCache
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--------------
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The ``MemcachedCache`` drivers stores the cache data in Memcached.
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.. code-block:: php
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$memcached = new Memcached();
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$cache = new MemcachedCache();
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$cache->setMemcached($memcached);
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MongoDBCache
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------------
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The ``MongoDBCache`` drivers stores the cache data in a MongoDB collection.
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.. code-block:: php
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$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
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$collection = new MongoDB\Collection($manager, 'database_name', 'collection_name');
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$cache = new MongoDBCache($collection);
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PhpFileCache
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------------
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The ``PhpFileCache`` driver stores the cache data on the local filesystem like the
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``FilesystemCache`` driver except the data is serialized using the ``serialize()``
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and ``unserialize()`` functions available in PHP. The files are included so this means
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that the data can be cached in PHPs opcache.
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.. code-block:: php
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$cache = new PhpFileCache('/path/to/cache/directory');
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PredisCache
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-----------
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The ``PredisCache`` driver stores the cache data in Redis
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and depends on the ``predis/predis`` package which can be installed with composer.
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.. code-block:: bash
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$ composer require predis/predis
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Then you can use the ``Predis\Client`` class to pass to the ``PredisCache`` class.
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.. code-block:: php
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$client = new Predis\Client();
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$cache = new PredisCache($client);
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RedisCache
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----------
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The ``RedisCache`` driver stores the cache data in Redis and depends on the
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``phpredis`` extension which can be found `here <https://github.com/phpredis/phpredis>`_.
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.. code-block:: php
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$redis = new Redis();
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$cache = new RedisCache($redis);
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SQLite3Cache
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------------
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The ``SQLite3Cache`` driver stores the cache data in a SQLite database and depends on the
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``sqlite3`` extension which can be found `here <http://php.net/manual/en/book.sqlite3.php>`_.
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.. code-block:: php
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$db = new SQLite3('mydatabase.db');
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$cache = new SQLite3Cache($db, 'table_name');
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VoidCache
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---------
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The ``VoidCache`` driver does not store the cache data anywhere. This can
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be useful for test environments where you don't want to cache the data
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anywhere but need to satisfy the dependency for the ``Doctrine\Common\Cache\Cache``
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interface.
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.. code-block:: php
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$cache = new VoidCache();
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WinCacheCache
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-------------
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The ``WinCacheCache`` driver uses the ``wincache_ucache_get``, ``wincache_ucache_exists``, etc. functions that come
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with the ``wincache`` extension which can be found `here <http://php.net/manual/en/book.wincache.php>`_.
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.. code-block:: php
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$cache = new WinCacheCache();
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XcacheCache
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-----------
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The ``XcacheCache`` driver uses functions that come with the ``xcache``
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extension which can be found `here <https://xcache.lighttpd.net/>`_.
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.. code-block:: php
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$cache = new XcacheCache();
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ZendDataCache
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-------------
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The ``ZendDataCache`` driver uses the Zend Data Cache API available in the Zend Platform.
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.. code-block:: php
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$cache = new ZendDataCache();
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Custom Drivers
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==============
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If you want to implement your own cache driver, you just need to implement
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the ``Doctrine\Common\Cache\Cache`` interface. Here is an example implementation
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skeleton.
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.. code-block:: php
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use Doctrine\Common\Cache\Cache;
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class MyCacheDriver implements Cache
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{
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public function fetch($id)
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{
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// fetch $id from the cache
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}
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public function contains($id)
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{
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// check if $id exists in the cache
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}
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public function save($id, $data, $lifeTime = 0)
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{
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// save $data under $id in the cache for $lifetime
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}
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public function delete($id)
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{
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// delete $id from the cache
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}
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public function getStats()
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{
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// get cache stats
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}
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}
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