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php-pico/caching
================

A PSR-6/PSR-16 compliant caching package.

0.1.0(1mo ago)01MITPHPPHP ^8.5

Since Jul 2Pushed 1mo agoCompare

[ Source](https://github.com/php-pico/caching)[ Packagist](https://packagist.org/packages/php-pico/caching)[ RSS](/packages/php-pico-caching/feed)WikiDiscussions main Synced 1w ago

READMEChangelog (1)Dependencies (4)Versions (2)Used By (0)

php-pico/caching
================

[](#php-picocaching)

A dependency-light PSR-16 (`psr/simple-cache`) and PSR-6 (`psr/cache`) cache for PHP 8.5+.

Two facades — the PSR-16 `Cache` and the PSR-6 `CachePool` — sit over the same swappable **drivers**. The facades own key validation, value (de)serialization and TTL handling; each driver only stores and retrieves the resulting string payloads. This keeps drivers thin, interchangeable, and independently testable, and lets both standards share one backend.

Installation
------------

[](#installation)

```
composer require php-pico/caching
```

PSR-16 (simple cache)
---------------------

[](#psr-16-simple-cache)

Construct a `Cache` with the driver of your choice and use it through the standard PSR-16 API:

```
use PhpPico\Caching\Cache;
use PhpPico\Caching\Driver\Testing\StaticDriver;

$cache = new Cache(new StaticDriver());

$cache->set('user.42', ['name' => 'Ada'], ttl: 3600);
$cache->get('user.42');                 // ['name' => 'Ada']
$cache->has('user.42');                 // true
$cache->delete('user.42');

$cache->setMultiple(['a' => 1, 'b' => 2]);
$cache->getMultiple(['a', 'b', 'c'], default: null);
$cache->deleteMultiple(['a', 'b']);
$cache->clear();
```

`get()`/`set()`/`delete()`/`clear()`/`has()` and the `*Multiple` variants all behave per the PSR-16 spec. Keys are validated (max 64 chars, `[A-Za-z0-9_.]`); an illegal key throws a PSR-16 `InvalidArgumentException`.

PSR-6 (cache item pool)
-----------------------

[](#psr-6-cache-item-pool)

Construct a `CachePool` with the same drivers and use the PSR-6 item API. Items are obtained from the pool via `getItem()`/`getItems()` — never instantiated directly.

```
use PhpPico\Caching\CachePool;
use PhpPico\Caching\Driver\Filesystem\FilesystemDriver;

$pool = new CachePool(new FilesystemDriver('/var/cache/app'));

$item = $pool->getItem('user.42');
if (!$item->isHit()) {
    $item->set(['name' => 'Ada'])->expiresAfter(3600);
    $pool->save($item);
}
$item->get();                           // ['name' => 'Ada']

$pool->hasItem('user.42');              // true
$pool->deleteItem('user.42');
$pool->clear();
```

Expiration is set on the item with `expiresAfter(int|\DateInterval|null)` or `expiresAt(?\DateTimeInterface)`. `getItem()` always returns an item (never null) — a miss is an item whose `isHit()` is `false` and whose `get()` is `null`.

**Deferred writes.** Queue items and flush them together with `commit()`. A deferred item is already visible to `getItem()`/`hasItem()` before the commit:

```
$pool->saveDeferred($pool->getItem('a')->set(1));
$pool->saveDeferred($pool->getItem('b')->set(2));

$pool->hasItem('a');                    // true (visible before commit)
$pool->commit();                        // persist both
```

If you forget `commit()`, the pool flushes any pending deferred items in its destructor, so they are still persisted when the pool is garbage-collected or the request ends — per PSR-6's guarantee that deferred items are not lost.

Illegal keys throw a `Psr\Cache\InvalidArgumentException`. Because the exception implements both PSR interfaces, the PSR-16 and PSR-6 facades can share one driver and interoperate — a value written through one reads back through the other.

Drivers
-------

[](#drivers)

All drivers implement `PhpPico\Caching\Driver\Driver` and are interchangeable between the PSR-16 `Cache` and the PSR-6 `CachePool`.

DriverBacking storePersistenceNotes`StaticDriver`in-memory arraycurrent request onlygreat for tests; nothing survives the request`NoopDriver`noneneverdiscards writes, always misses — disables caching transparently`FilesystemDriver`JSON files on diskdurableTTL enforced on read; guards against directory traversal`RedisDriver`Redis / Valkey over a socketdurablehand-rolled RESP2, TTL via `EXAT`, optional reconnect```
use PhpPico\Caching\Cache;
use PhpPico\Caching\Driver\Testing\NoopDriver;
use PhpPico\Caching\Driver\Testing\StaticDriver;
use PhpPico\Caching\Driver\Filesystem\FilesystemDriver;

new Cache(new StaticDriver());
new Cache(new NoopDriver());
new Cache(new FilesystemDriver('/var/cache/app'));
```

### RedisDriver

[](#redisdriver)

`RedisDriver` speaks the RESP2 protocol directly over a TCP stream — it needs no `ext-redis` or other extension. Because it only depends on RESP2, it works with **Redis, Valkey, and any other RESP2-compatible server** (KeyDB, DragonflyDB, etc.). It is validated against Redis 8.x/7.x/6.x and Valkey 9.x/8.x/7.x.

A `RedisDriver` takes a `RedisConnection`, built one of two ways.

**From connection details** — dials Redis lazily on first use:

```
use PhpPico\Caching\Cache;
use PhpPico\Caching\Driver\Redis\RedisConnection;
use PhpPico\Caching\Driver\Redis\RedisDriver;

$connection = RedisConnection::build(
    host: '127.0.0.1',
    port: 6379,
    timeoutSeconds: 3,
    database: 0,
    reconnectTries: 1,
);

$cache = new Cache(new RedisDriver($connection));
```

**From an existing stream** — bring your own socket (e.g. a pre-opened, pooled, or already-authenticated connection):

```
$stream = stream_socket_client('tcp://127.0.0.1:6379');

$connection = RedisConnection::fromStream($stream, database: 0);
$cache = new Cache(new RedisDriver($connection));
```

#### Selecting a database

[](#selecting-a-database)

`build()` selects its `database` automatically on first use (a fresh connection starts on db 0, so a `SELECT` is only sent when `database > 0`). A connection built from a supplied stream is not auto-selected — call `select()` yourself:

```
$connection->select(1);
$connection->currentDatabase();   // 1
```

#### Reconnection

[](#reconnection)

On a dropped connection (server restart, failover, idle kill), `RedisDriver`transparently reconnects and replays the failed command, up to `reconnectTries`times with a short backoff between attempts. This matters for long-lived runtimes (FrankenPHP, ReactPHP, Swoole, queue workers) where a single connection is reused across many requests; classic per-request PHP-FPM rarely needs it.

Only commands that are safe to run twice are replayed — every command this driver issues is idempotent (`GET`/`SET`/`DEL`/`MSET`/`MSETEX`/`EXISTS`/ `FLUSHDB`, with writes using an absolute `EXAT` so a delayed replay does not drift the TTL). A protocol error (a Redis `-ERR` reply) is never retried. A connection built from a supplied stream cannot re-dial, so it surfaces the failure instead of reconnecting.

Set `reconnectTries: 0` to disable reconnection. A transport failure that cannot be recovered throws `PhpPico\Caching\Driver\Redis\Exceptions\RedisConnectionException`(a subclass of the PSR-16 `CacheException`).

Custom drivers
--------------

[](#custom-drivers)

Implement `PhpPico\Caching\Driver\Driver`. Drivers operate on already-serialized `string` payloads and an absolute `?int $expiresAt` timestamp — the facades handle key validation and (de)serialization. The `DriverTrait` provides naive multi-key operations built on the single-key methods, so a driver only has to implement `get`/`set`/`delete`/`clear`/`has`. A new driver works with both the PSR-16 and PSR-6 facades automatically.

Development
-----------

[](#development)

```
composer test     # PHPUnit
composer mago      # static analysis (mago)
composer format    # code style (mago)
composer qa        # format + analyze + test
```

License
-------

[](#license)

MIT.

###  Health Score

36

—

LowBetter than 79% of packages

Maintenance90

Actively maintained with recent releases

Popularity1

Limited adoption so far

Community6

Small or concentrated contributor base

Maturity41

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Unknown

Total

1

Last Release

48d ago

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/33836112?v=4)[Kevin From](/maintainers/kevinfrom)[@kevinfrom](https://github.com/kevinfrom)

---

Top Contributors

[![kevinfrom](https://avatars.githubusercontent.com/u/33836112?v=4)](https://github.com/kevinfrom "kevinfrom (28 commits)")

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/php-pico-caching/health.svg)

```
[![Health](https://phpackages.com/badges/php-pico-caching/health.svg)](https://phpackages.com/packages/php-pico-caching)
```

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