File

The file cache backend.

This backend will cache data to the filesystem. It is basically a "works all the time" backend that is available regardless of what modules are installed or server software is available. It is very handing for using caching on systems where no other cache backends are available.

Available config options:

• cache_dir - The directory to store cache files in. Default is to use a 'cache' directory in the application .runtime directory.
• file_prefix - This is an optional prefix to apply to the cache files. Useful if you want to separate your cache files. Default: no prefix
• use_zlib - Enable or disable zlib compression on the cache files. This can slow things down quite a bit more, but is useful when you
• encode_fs - Encodes the filesystem files using an md5 hash to obscure file namespaces on disk are caching very large things. I wouldn't bother using it under normal circumstances. Default: false.

Properties

weight

protected int $weight = 4

zlib

private bool $zlib

cacheDir

private string $cacheDir

timeout

private int $timeout

local

private array $local

store

private BTree $store

__openStore

private array $__openStore

Methods

__destruct

Store the namespace timeout in the cache dir timeout file.

public __destruct(): void

This should only happen if a keepalive() has been called.

available

public available(): bool

init

public init(string $namespace): void

Parameters

Parameter	Type	Description
$namespace	string

has

Check if a value exists.

public has(string $key, bool $check_empty = false): bool

Parameters

Parameter	Type	Description
$key	string
$check_empty	bool

get

public get(string $key): mixed

Parameters

Parameter	Type	Description
$key	string

set

public set(string $key, mixed $value, ?int $timeout = 0): bool

Parameters

Parameter	Type	Description
$key	string
$value	mixed
$timeout	int

remove

public remove(string $key): bool

Parameters

Parameter	Type	Description
$key	string

clear

public clear(): bool

toArray

public toArray(): void

count

public count(): int

keepalive

private keepalive(): void

load

Load the key value from storage.

private load(string $key, ?array $cache): mixed

This should only happen once and then it will be stored in memory and only written again when changed.

Parameters

Parameter	Type	Description
$key	string
$cache	array

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