TYPO3\CMS\Core\Cache\Backend\NullBackend Class Reference

Inheritance diagram for TYPO3\CMS\Core\Cache\Backend\NullBackend:

Public Member Functions
	set ($entryIdentifier, $data, array $tags=[], $lifetime=null)
	setCompression ($compression)
	get ($entryIdentifier)
	has ($entryIdentifier)
	remove ($entryIdentifier)
	findIdentifiersByTag ($tag)
	flush ()
	flushByTag ($tag)
	collectGarbage ()
	requireOnce ($identifier)
Public Member Functions inherited from TYPO3\CMS\Core\Cache\Backend\AbstractBackend
	__construct ($context, array $options=[])
	setCache (\TYPO3\CMS\Core\Cache\Frontend\FrontendInterface $cache)
	setDefaultLifetime ($defaultLifetime)

Additional Inherited Members
Public Attributes inherited from TYPO3\CMS\Core\Cache\Backend\AbstractBackend
const	DATETIME_EXPIRYTIME_UNLIMITED = '9999-12-31T23:59:59+0000'
const	UNLIMITED_LIFETIME = 0
Protected Member Functions inherited from TYPO3\CMS\Core\Cache\Backend\AbstractBackend
	calculateExpiryTime ($lifetime=null)
Protected Attributes inherited from TYPO3\CMS\Core\Cache\Backend\AbstractBackend
	$cache
	$cacheIdentifier
	$context
	$defaultLifetime = 3600

Detailed Description

A caching backend which forgets everything immediately

This file is a backport from FLOW3

Definition at line 23 of file NullBackend.php.

Member Function Documentation

collectGarbage()

TYPO3\CMS\Core\Cache\Backend\NullBackend::collectGarbage

(

)

Does nothing

Returns

void

Implements TYPO3\CMS\Core\Cache\Backend\BackendInterface.

Definition at line 124 of file NullBackend.php.

findIdentifiersByTag()

TYPO3\CMS\Core\Cache\Backend\NullBackend::findIdentifiersByTag

(

$tag

)

Returns an empty array

Parameters

string

$tag

ignored

Returns

array An empty array

Implements TYPO3\CMS\Core\Cache\Backend\TaggableBackendInterface.

Definition at line 92 of file NullBackend.php.

flush()

TYPO3\CMS\Core\Cache\Backend\NullBackend::flush

(

)

Does nothing

Returns

void

Implements TYPO3\CMS\Core\Cache\Backend\BackendInterface.

Definition at line 103 of file NullBackend.php.

flushByTag()

TYPO3\CMS\Core\Cache\Backend\NullBackend::flushByTag

(

$tag

)

Does nothing

Parameters

string

$tag

ignored

Returns

void

Implements TYPO3\CMS\Core\Cache\Backend\TaggableBackendInterface.

Definition at line 114 of file NullBackend.php.

get()

TYPO3\CMS\Core\Cache\Backend\NullBackend::get

(

$entryIdentifier

)

Returns False

Parameters

string

$entryIdentifier

ignored

Returns

bool FALSE

Implements TYPO3\CMS\Core\Cache\Backend\BackendInterface.

Definition at line 56 of file NullBackend.php.

has()

TYPO3\CMS\Core\Cache\Backend\NullBackend::has

(

$entryIdentifier

)

Returns False

Parameters

string

$entryIdentifier

ignored

Returns

bool FALSE

Implements TYPO3\CMS\Core\Cache\Backend\BackendInterface.

Definition at line 68 of file NullBackend.php.

remove()

TYPO3\CMS\Core\Cache\Backend\NullBackend::remove

(

$entryIdentifier

)

Does nothing

Parameters

string

$entryIdentifier

ignored

Returns

bool FALSE

Implements TYPO3\CMS\Core\Cache\Backend\BackendInterface.

Definition at line 80 of file NullBackend.php.

requireOnce()

TYPO3\CMS\Core\Cache\Backend\NullBackend::requireOnce

(

$identifier

)

Does nothing

Parameters

string

$identifier

An identifier which describes the cache entry to load

Returns

void

Implements TYPO3\CMS\Core\Cache\Backend\PhpCapableBackendInterface.

Definition at line 135 of file NullBackend.php.

set()

TYPO3\CMS\Core\Cache\Backend\NullBackend::set	(		$entryIdentifier,
			$data,
		array	$tags = [],
			$lifetime = null
	)

Acts as if it would save data

Parameters

string	$entryIdentifier	ignored
string	$data	ignored
array	$tags	ignored
int	$lifetime	ignored

Returns

void

Implements TYPO3\CMS\Core\Cache\Backend\BackendInterface.

Definition at line 35 of file NullBackend.php.

setCompression()

TYPO3\CMS\Core\Cache\Backend\NullBackend::setCompression

(

$compression

)

Acts as if it would enable data compression

Parameters

bool

$compression

ignored

Returns

void

Definition at line 45 of file NullBackend.php.