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ACache, a flexible PHP cache library

ACache - another PHP cache library.

ACache requires PHP 7.2 or later.

Installation

Install the latest version with

Features

ACache is inspired by the doctrine cache component. In fact, there is even a decorator to allow you to use any ACache instance in place of doctrine cache.

Since some features were hard to add on top of that I ended up writing my own :)

Namespaces

The Radebatz\ACache\Cache interface allows to explicitely use a namespace for any given id.

While that works well it sometimes is desirable to do this a little bit more transparent (and save some typing).

Wrapping an existing cache instance in a Radebatz\ACache\NamespaceCache effectively allows to partition that cache without the need to carry the namespace around for all method calls.

Multi level

Sometimes losing and re-building your cache due to a reboot or similar can be quite expensive. One way to cope with that is by using a multi-level cache.

A fast (non-persistent) cache is used as primary cache. If an entry cannot be found in that (for example, due to a reboot) it will fall back to a persistent cache (filesystem, db). Only if all configured cache instances are queried an entry would be declared as not found.

Running the same code again will result in the same output, even if the save() call is commented out.

Here the Radebatz\ACache\ArrayCache instance will be empty and the Radebatz\ACache\MultiLevelCache will fall back to using the file based cache to lookup (and find) the cache entry.

Nesting

Both namespace and multi-level cache instances can be arbitrary nested.

Psr/Cache

All cache instances can be used as Psr\Cache\CacheItemPoolInterface instances by wrapping them in a Psr decorator.

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Testing

ACache comes with a pretty complete set of tests for a single cache instance and also combinations of multi-level and namespace caches.

License

ACache is licensed under the MIT license.

Changelog

All issues that break backwards compatibility are flagged [BC].

v1.1.0

• [BC] make namespace last argument of save() method [#4]
• add changelog to provide upgrade details [#8]
• add DoctrineCache decorator class [#9]
• make autoloader use prs-4
• allow to override defaults in PHPUnit tests [#12]
• add NullCache class [#13]

v1.1.1

• [BC] allow to configure a default time-to-live [#7] This changes the default of $lifeTime argument of the save() method to null
• add some sort of GC to ApcCache [#16]

v1.2.0

• [BC] Refactor Apc GC into separat class [#18]

v1.2.1

• Add log support to MultiLevelCache [#1]
• Streamline multi level cache stack validation

v1.2.2

• Add psr-6 support

v1.2.3

• Add option to allow ArrayCache instances to share a single cache instance [#27]
• Integrate 'cache/integrationtests' (PHP5.4+ only)

v1.3.0

• [BC] Refactor permission options [#32], [#33]
• Add hardFlush option to FilesystemCache to allow to delete directories on flush too [#34]

v1.3.1

• Saving expired (lifeTime < 0) should behave like delete [#39]
• Fix ApcCache::flush() in hhvm [#41]
• Fix invalid offset warning in MultiLevelCace when stripping unavailable cache from stack [#45]

v1.3.2

• Refactor cache/integraton-tests test classes
• Fix APC being reported unavailable with PHP7 [#47]

2.0.0

• drop support for PHP 5.3, 5.4 and remove from test matrix
• add PHP 7.1 and 7.2 to test matrix

2.0.1

• drop support for PHP 5.5 and hhvm
• validate against cache/integration-tests
• disable chmod/chown/chgrp warnings in FilesystemCache
• add CS rules
• update dev dependencies

2.0.2

• disable more chmod/chown/chgrp warnings in FilesystemCache

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