🗄️ Cache

A simple and primitive library for caching values for PHP >8.1.

Installation

composer require please/cache

Examples

You can find usage examples here.

Drivers

Available drivers:

• Filesystem
  • This driver uses the file system to store the cache.
• Memory
  • This driver uses the memory to store the cache.
• Session
  • This driver uses the $_SESSION to store the cache.

Filesystem

This driver uses the file system to store the cache.

use Please\Cache\Cache;
use Please\Cache\Drivers\Filesystem;

$cache = new Cache(new Filesystem);

$cache->set('foo', 'bar');
$cache->get('foo'); // bar

You can provide a specific parameters.

use Please\Cache\Cache;
use Please\Cache\Drivers\Filesystem;

$driver = new Filesystem(folder: '/path/to/folder', prefix: 'data');

$cache = new Cache($driver);

$cache->set('foo', fn () => ['bar']);
$cache->get('foo'); // ['bar']

Memory

This driver uses the memory to store the cache.

Warning

After the script completes the memory will be cleared.

use Please\Cache\Cache;
use Please\Cache\Drivers\Memory;

$cache = new Cache(new Memory);
$anotherCacheInstance = new Cache(new Memory);

By default, cache created with Memory driver under hood.

use Please\Cache\Cache;

$cache = new Cache;

Session

This driver uses the $_SESSION to store the cache.

use Please\Cache\Cache;
use Please\Cache\Drivers\Session;

$cache = new Cache(new Session);

You can pass the key in which the cache will be stored.

use Please\Cache\Cache;
use Please\Cache\Drivers\Session;

$apiCache = new Cache(new Session('_api'));
$imageCache = new Cache(new Session('_images'));

Cache

You can create as many Cache instances as you need.

use Please\Cache\Cache;
use Please\Cache\Drivers\Session;
use Please\Cache\Drivers\Filesystem;

$videoCache = new Cache(new Session('your unique key'));
$imageCache = new Cache(new Filesystem('/path/to/images'));

By default, for serialization uses native PHP functions serialize() and unserialize().

You can create and pass your own serializer if you need to, for example to serialize closures, classes, etc.

use Please\Cache\Cache;
use Please\Cache\Drivers\Filesystem;
use Please\Cache\Serializers\Contracts\Serializer;

class JsonSerializer implements Serializer
{
    public function serialize(mixed $value): string
    {
        return json_encode($value);
    }

    public function unserialize(mixed $value): mixed
    {
        return json_decode($value, true);
    }
}

$cache = new Cache(new Filesystem, new JsonSerializer);

Methods

set()

Persists value in the cache, uniquely referenced by a key with an optional expiration TTL time.

Parameter	Required	Default
string $key	true
mixed $value	true
int|string $ttl	false	1 year

$cache->set(key: 'foo', value: 'bar', ttl: 3600);

You can pass the TTL value as a string like for the strtotime() function.

$cache->set('foo', ['bar', 'baz'], '1 day');

// the example above is equivalent to this code
$ttl = strtotime('1 day') - time();
$cache->set('foo', 'bar', $ttl);

get()

Fetches a value from the cache.

Parameter	Required	Default
string $key	true
mixed $default	false	null

$cache->get(key: 'foo', default: 'baz');

Pass a default value as a Closure, it will be executed lazily if the key is not found.

$cache->get('foo', fn () => 'baz');

has()

Determines whether an item is present in the cache.

Parameter	Required	Default
string $key	true

$cache->set('foo', 'bar');

$cache->has('foo'); // true
$cache->has('baz'); // false

clear()

Wipes all cache.

Note

The $cacheInstance->clear() method will only work for the instance in which it was called.

$cache->set('foo1', 'bar1')->has('foo1'); // true
$cache->set('foo2', 'bar2')->has('foo2'); // true

$cache->clear();

$cache->has('foo1'); // false
$cache->has('foo2'); // false

forget()

Delete cache by key.

Parameter	Required	Default
string $key	true

$cache->set('foo', 'bar')->has('foo'); // true

$cache->forget('foo');

$cache->has('foo'); // false

pluck()

Removes and returns an item from the cache by its key.

Parameter	Required	Default
string $key	true
mixed $default	false	null

$cache->set('foo', 'bar')->has('foo'); // true

$cache->pluck('foo'); // bar

$cache->has('foo'); // false

through()

If the closure is not cached, then executes it, otherwise returns the cached result of closure execution.

This method used ClosureHash under hood.

Note

The closure must return a value suitable for serialization by the serializer you choose.

Parameter	Required	Default
string $callback	true
int|string $ttl	false	1 year

$closure = function () {
    return mt_rand();
};

$cache->through($closure);
$cache->through($closure); // returns cached result of closure execution

License

Open-sourced software licensed under the MIT license.