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Example code of ez-php/cache

Informations about the package cache

ez-php/cache

Cache module for the ez-php framework — array, file, Redis, and Memcached drivers with a unified interface, tagging, locking, cache statistics, and stampede protection.

CI

Requirements

Installation

Setup

Register the service provider:

Configure in config/cache.php:

Use the module-scoped CACHE_REDIS_* variables, not the generic REDIS_HOST/REDIS_PORT: in an application built from the ez-php/ template, REDIS_PORT is the host-published port (e.g. 6383), while the app container always reaches Redis at redis:6379.

Usage

Basic operations

Values must be null, scalars, or (nested) arrays of those. Every driver throws a CacheException for objects and resources — the File and Redis drivers restore values with allowed_classes => false, so an object could never come back intact. Cache a scalar/array representation instead and rebuild the object after reading it:

Increment / decrement

Both are atomic (Redis: native INCRBY/DECRBY; File/Array/Memcached: read-modify-write) and create the key with a starting value of 0 when it does not already exist.

Tagging

Locking

release() only removes a lock this instance acquired and still owns: if the TTL ran out and another process took the lock meanwhile, the late release() leaves that lock alone. Use forceRelease() for a deliberate hand-off where another process releases (it removes the lock whoever holds it; FileLock can't break another process's flock(), so there it only releases its own).

Stampede protection

Key prefixes

Several applications or tenants sharing one store keep their keys apart with PrefixedCache — or set cache.prefix (CACHE_PREFIX) and the provider wraps the configured driver for you:

Keys, locks and tags are prefixed. flush() still empties the whole underlying store (every prefix); tag entries and flush the tag to invalidate one prefix.

Console commands

With an ez-php application (and ez-php/console, which the framework already requires), CacheServiceProvider registers:

With the apcu driver cache:clear exits 1 instead: the console has its own APCu memory and cannot reach the PHP-FPM workers' cache. Restart PHP-FPM, or flush from a web request. For the same reason, values a queue worker or other CLI process writes to APCu are never seen by web requests.

cache:prune is a no-op on stores that evict on their own (array, file, Redis, Memcached).

Drivers

Driver CACHE_DRIVER Notes
array array In-memory, request lifetime only
file file Filesystem, serialised entries
redis redis Via ext-redis; flush() clears entire database
memcached memcached Via ext-memcached; flush() clears entire server
apcu apcu Via ext-apcu (CLI: apc.enable_cli=1); shared by the PHP-FPM workers of one host — not with CLI processes, each of which gets its own short-lived APCu memory; atomic counters; flush() clears the APCu user cache
database database On the bound DatabaseInterface; tables cache/cache_locks auto-created (MySQL, SQLite, PostgreSQL); flush() empties only the cache table

Classes

Class Description
CacheInterface Unified contract: get, set, forget, has, remember, flush, increment, decrement
ArrayDriver In-memory driver
FileDriver Filesystem driver with MD5-keyed files
RedisDriver Redis driver via ext-redis; native TTL
MemcachedDriver Memcached driver via ext-memcached
ApcuDriver Shared-memory driver via ext-apcu (one host)
DatabaseDriver Database driver on DatabaseInterface; auto-created tables; run cache:prune (or prune()) periodically to delete expired rows that are never read again
PrunableCacheInterface prune(): int — implemented by DatabaseDriver
CacheClearCommand / CachePruneCommand cache:clear [--tags=…] / cache:prune
FileLock / ArrayLock / RedisLock / MemcachedLock / DatabaseLock / ApcuLock Driver-specific lock implementations
TaggableDriverTrait Provides tags() → TaggedCache for all drivers
TaggedCache Tag-scoped decorator: records keys per tag; flush() invalidates the group
CacheStats Immutable value object: hits, misses
CacheValue Value-contract guard used by every driver's set(): rejects objects and resources
StampedeProtectedCache Decorator: probabilistic early recompute to prevent stampedes
PrefixedCache Decorator: prefixes every key, lock and tag list; wired by cache.prefix
CacheServiceProvider Config-driven driver binding

License

MIT — Andreas Uretschnig

All versions of cache with dependencies

PHP Build Version
Package Version
Requires php Version ^8.5
ez-php/contracts Version ^2.7.0
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