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PHP Cache AdapterBundle

AdapterBundle creates PSR-6 cache services from Symfony configuration.

Version 2.1 requires PHP 8.2, psr/cache 3, psr/log 3, and Symfony 6.4, 7, or 8. It supports PHP Cache 2 and 3 adapters.

Installation

Install the bundle and the adapter package your app needs:

Symfony Flex may register the bundle automatically. Otherwise, add it to config/bundles.php:

Configuration

This example registers cache.provider.default and aliases a lazy fallback wrapper as cache, php_cache, and app.cache. If creating the default provider throws, the wrapper creates cache.provider.void instead. A full service ID such as @cache.provider.void is also accepted.

AdapterBundle matches a bare value against configured provider names first. Provider names that contain dots, such as warm.tier, therefore work without a service prefix.

The bundle follows service aliases before creating the wrapper. It rejects the default provider and aliases that lead back to it.

It also rejects cache, php_cache, cache.provider.default_fallback, and circular alias chains.

fallback_provider handles failures that occur while Symfony constructs the default provider. For failures raised later by cache operations, configure a Chain provider with skip_on_failure: true and place a Void provider last.

Version 2.1 provides APCu, Array, Chain, Filesystem, Memcache, Memcached, MongoDB, Namespaced, Predis, Prefixed, Redis, and Void factories for PHP Cache 2 and 3.

Applications can use a custom service that implements AdapterFactoryInterface as a provider factory. AdapterBundle validates the service after Symfony merges all extension definitions, so another app bundle can define it.

Memcached driver_options override the pool defaults. This configuration keeps the default server and uses the ASCII protocol:

namespace and pool_namespace must not be empty. Redis DSNs support both password-only authentication and ACL credentials such as redis://alice:[email protected]:6379/0. Percent-encode reserved characters in usernames and passwords.

Read the complete AdapterBundle documentation for every factory and option.

Using version 3 adapters

AdapterBundle 2.1 supports PHP Cache 3 adapters while it remains compatible with PHP Cache 2 adapters.

PHP Cache 3 stores a generation snapshot with each tagged item and a generation marker for each tag. Version 2 and 3 workers cannot safely share tagged cache storage.

Stop or drain all workers, clear each shared cache, and then deploy AdapterBundle 2.1 with version 3 adapters. Follow the same sequence before a rollback.

Upgrading from version 1

Version 2 removes the APC factory and every Doctrine-backed factory. Use cache.factory.apcu, a supported native adapter, or an external PSR-6 service.

The Namespaced and Prefixed factories preserve native tag support. The Array, Memcached, Predis, and Redis pool_namespace options preserve it too. Code that constructs those decorators directly should use their create() factories when tagged items are required.

Replace MongoDB's namespace option with database and collection. Replace Predis's schema option with scheme.

PHP Cache 2 changes APCu payloads, Redis and Predis tag indexes, namespaced tag indexes, and hierarchy storage paths. Do not mix version 1 and version 2 workers on an affected store.

Clear a namespaced store when a namespace contains bytes outside [A-Za-z0-9_.] or lowercase _x. Also clear it when a public key contains |, !, or lowercase _x.

Clear namespaced stores containing tagged or hierarchy items. Clear a prefixed store when its prefix contains bytes outside [A-Za-z0-9_.] or lowercase _x.

Stop or drain old workers, clear each affected store, and then deploy version 2. Follow the same sequence before rolling back.

Contributing

Run composer quality before opening a pull request. Report problems on the GitHub issue tracker.