Symfony\Component\Cache\Adapter\NullAdapter

class NullAdapter implements AdapterInterface, CacheInterface

Methods

__construct()

No description

mixed

get(string $key, callable $callback, float $beta = null, array $metadata = null)

Fetches a value from the pool or computes it if not found.

CacheItem

getItem($key)

{@inheritdoc}

Traversable|CacheItem[]

getItems(array $keys = array())

{@inheritdoc}

hasItem($key)

{@inheritdoc}

clear()

{@inheritdoc}

deleteItem($key)

{@inheritdoc}

deleteItems(array $keys)

{@inheritdoc}

save(CacheItemInterface $item)

{@inheritdoc}

saveDeferred(CacheItemInterface $item)

{@inheritdoc}

commit()

{@inheritdoc}

bool

delete(string $key)

Removes an item from the pool.

Details

`__construct()`

`mixed get(string $key, callable $callback, float $beta = null, array $metadata = null)`

Fetches a value from the pool or computes it if not found.

On cache misses, a callback is called that should return the missing value. This callback is given a PSR-6 CacheItemInterface instance corresponding to the requested key, that could be used e.g. for expiration control. It could also be an ItemInterface instance when its additional features are needed.

Parameters

string	$key	The key of the item to retrieve from the cache
callable	$callback	Should return the computed value for the given key/item
float	$beta	A float that, as it grows, controls the likeliness of triggering early expiration. 0 disables it, INF forces immediate expiration. The default (or providing null) is implementation dependent but should typically be 1.0, which should provide optimal stampede protection. See https://en.wikipedia.org/wiki/Cache_stampede#Probabilistic_early_expiration
array	$metadata	&$metadata The metadata of the cached item {see ItemInterface::getMetadata()}

Return Value

mixed

The value corresponding to the provided key

Exceptions

InvalidArgumentException

When $key is not valid or when $beta is negative

`CacheItem getItem($key)`

{@inheritdoc}

Parameters

$key

Return Value

CacheItem

`Traversable|CacheItem[] getItems(array $keys = array())`

{@inheritdoc}

Parameters

array

$keys

Return Value

Traversable|CacheItem[]

`hasItem($key)`

{@inheritdoc}

Parameters

$key

`clear()`

{@inheritdoc}

`deleteItem($key)`

{@inheritdoc}

Parameters

$key

`deleteItems(array $keys)`

{@inheritdoc}

Parameters

array

$keys

`save(CacheItemInterface $item)`

{@inheritdoc}

Parameters

CacheItemInterface

$item

`saveDeferred(CacheItemInterface $item)`

{@inheritdoc}

Parameters

CacheItemInterface

$item

`commit()`

{@inheritdoc}

`bool delete(string $key)`

Removes an item from the pool.

Parameters

string

$key

The key to delete

Return Value

bool	True if the item was successfully removed, false if there was any error

Exceptions

InvalidArgumentException

When $key is not valid