Cache/Core.php

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Zend Framework

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Category: Zend
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License
Package: Zend_Cache
Version: $Id$

\Zend_Cache_Core
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Package: Zend_Cache

Children: \Zend_Cache_Frontend_Class; \Zend_Cache_Frontend_File; \Zend_Cache_Frontend_Capture; \Zend_Cache_Frontend_Page; \Zend_Cache_Frontend_Output; \Zend_Cache_Frontend_Function
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License

Constants

 
                BACKEND_NOT_SUPPORTS_TAG
                = 'tags are not supported by the current backend'

Messages

 
                BACKEND_NOT_IMPLEMENTS_EXTENDED_IF
                = 'Current backend doesn\'t implement the Zend_Cache_Backend_ExtendedInterface, so this method is not available'

Properties

\Zend_Cache_Backend_Interface $_backend = null

Backend Object

Default valuenullDetails

Type: \Zend_Cache_Backend_Interface

array $_backendCapabilities = array()

Array of capabilities of the backend (only if it implements Zend_Cache_Backend_ExtendedInterface)

Default valuearray()Details

Type: array

array $_directivesList = array('lifetime', 'logging', 'logger')

static

Array of options which have to be transfered to backend

Default valuearray('lifetime', 'logging', 'logger')Details

Type: array

boolean $_extendedBackend = false

True if the backend implements Zend_Cache_Backend_ExtendedInterface

Default valuefalseDetails

Type: boolean

string $_lastId = null

Last used cache id

Default valuenullDetails

Type: string

array $_options = array('write_control' => true, 'caching' => true, 'cache_id_prefix' => null, 'automatic_serialization' => false, 'automatic_cleaning_factor' => 10, 'lifetime' => 3600, 'logging' => false, 'logger' => null, 'ignore_user_abort' => false)

Available options

====> (boolean) write_control : - Enable / disable write control (the cache is read just after writing to detect corrupt entries) - Enable write control will lightly slow the cache writing but not the cache reading Write control can detect some corrupt cache files but maybe it's not a perfect control ====> (boolean) caching : - Enable / disable caching (can be very useful for the debug of cached scripts) =====> (string) cache_id_prefix : - prefix for cache ids (namespace) ====> (boolean) automatic_serialization : - Enable / disable automatic serialization - It can be used to save directly datas which aren't strings (but it's slower) ====> (int) automatic_cleaning_factor : - Disable / Tune the automatic cleaning process - The automatic cleaning process destroy too old (for the given life time) cache files when a new cache file is written : 0 => no automatic cache cleaning 1 => systematic cache cleaning x (integer) > 1 => automatic cleaning randomly 1 times on x cache write ====> (int) lifetime : - Cache lifetime (in seconds) - If null, the cache is valid forever. ====> (boolean) logging : - If set to true, logging is activated (but the system is slower) ====> (boolean) ignore_user_abort - If set to true, the core will set the ignore_user_abort PHP flag inside the save() method to avoid cache corruptions in some cases (default false)

Default value

array('write_control' => true, 'caching' => true, 'cache_id_prefix' => null, 'automatic_serialization' => false, 'automatic_cleaning_factor' => 10, 'lifetime' => 3600, 'logging' => false, 'logger' => null, 'ignore_user_abort' => false)

Details

Type: array

array $_specificOptions = array()

Not used for the core, just a sort a hint to get a common setOption() method (for the core and for frontends)

Default valuearray()Details

Type: array

Methods

__construct(array | \Zend_Config $options = array()) : void

Constructor

Parameters

Name	Type	Description
$options	array \| \Zend_Config	Associative array of options or Zend_Config instance

Throws

Exception	Description
\Zend_Cache_Exception

_id(string $id) : string

Make and return a cache id

Checks 'cache_id_prefix' and returns new id with prefix or simply the id if null

Parameters

Name	Type	Description
$id	string	Cache id

Returns

Type	Description
string	Cache id (with or without prefix)

_log(string $message, $priority = 4) : void

Log a message at the WARN (4) priority.

Parameters

Name	Type	Description
$message	string
$priority

Throws

Exception	Description
\Zend_Cache_Exception

_loggerSanity() : void

Make sure if we enable logging that the Zend_Log class is available.

Create a default log object if none is set.

Throws

Exception	Description
\Zend_Cache_Exception

_setOption(string $name, mixed $value) : void

Set an option

Parameters

Name	Type	Description
$name	string	Name of the option
$value	mixed	Value of the option

Throws

Exception	Description
\Zend_Cache_Exception

_validateIdOrTag(string $string) : void

static

Validate a cache id or a tag (security, reliable filenames, reserved prefixes.

..) Throw an exception if a problem is found

Parameters

Name	Type	Description
$string	string	Cache id or tag

Throws

Exception	Description
\Zend_Cache_Exception

_validateTagsArray(array $tags) : void

static

Validate a tags array (security, reliable filenames, reserved prefixes.

..) Throw an exception if a problem is found

Parameters

Name	Type	Description
$tags	array	Array of tags

Throws

Exception	Description
\Zend_Cache_Exception

clean(string $mode = 'all', array | string $tags = array()) : boolean

Clean cache entries

Available modes are : 'all' (default) => remove all cache entries ($tags is not used) 'old' => remove too old cache entries ($tags is not used) 'matchingTag' => remove cache entries matching all given tags ($tags can be an array of strings or a single string) 'notMatchingTag' => remove cache entries not matching one of the given tags ($tags can be an array of strings or a single string) 'matchingAnyTag' => remove cache entries matching any given tags ($tags can be an array of strings or a single string)

Parameters

Name	Type	Description
$mode	string
$tags	array \| string

Returns

Type	Description
boolean	True if ok

Throws

Exception	Description
\Zend_Cache_Exception

getBackend() : \Zend_Cache_Backend

Returns the backend

Returns

Type	Description
\Zend_Cache_Backend	backend object

getFillingPercentage() : int

Return the filling percentage of the backend storage

Returns

Type	Description
int	integer between 0 and 100

getIds() : array

Return an array of stored cache ids

Returns

Type	Description
array	array of stored cache ids (string)

getIdsMatchingAnyTags(array $tags = array()) : array

Return an array of stored cache ids which match any given tags

In case of multiple tags, a logical OR is made between tags

Parameters

Name	Type	Description
$tags	array	array of tags

Returns

Type	Description
array	array of matching any cache ids (string)

getIdsMatchingTags(array $tags = array()) : array

Return an array of stored cache ids which match given tags

In case of multiple tags, a logical AND is made between tags

Parameters

Name	Type	Description
$tags	array	array of tags

Returns

Type	Description
array	array of matching cache ids (string)

getIdsNotMatchingTags(array $tags = array()) : array

Return an array of stored cache ids which don't match given tags

In case of multiple tags, a logical OR is made between tags

Parameters

Name	Type	Description
$tags	array	array of tags

Returns

Type	Description
array	array of not matching cache ids (string)

getMetadatas(string $id) : array

Return an array of metadatas for the given cache id

The array will include these keys : - expire : the expire timestamp - tags : a string array of tags - mtime : timestamp of last modification time

Parameters

Name	Type	Description
$id	string	cache id

Returns

Type	Description
array	array of metadatas (false if the cache id is not found)

getOption(string $name) : mixed

Public frontend to get an option value

Parameters

Name	Type	Description
$name	string	Name of the option

Returns

Type	Description
mixed	option value

Throws

Exception	Description
\Zend_Cache_Exception

getTags() : array

Return an array of stored tags

Returns

Type	Description
array	array of stored tags (string)

load(string $id, boolean $doNotTestCacheValidity = false, boolean $doNotUnserialize = false) : mixed | false

Test if a cache is available for the given id and (if yes) return it (false else)

Parameters

Name	Type	Description
$id	string	Cache id
$doNotTestCacheValidity	boolean	If set to true, the cache validity won't be tested
$doNotUnserialize	boolean	Do not serialize (even if automatic_serialization is true) => for internal use

Returns

Type	Description
mixed \| false	Cached datas

remove(string $id) : boolean

Remove a cache

Parameters

Name	Type	Description
$id	string	Cache id to remove

Returns

Type	Description
boolean	True if ok

save(mixed $data, string $id = null, array $tags = array(), int $specificLifetime = false, int $priority = 8) : boolean

Save some data in a cache

Parameters

Name	Type	Description
$data	mixed	Data to put in cache (can be another type than string if automatic_serialization is on)
$id	string	Cache id (if not set, the last cache id will be used)
$tags	array	Cache tags
$specificLifetime	int	If != false, set a specific lifetime for this cache record (null => infinite lifetime)
$priority	int	integer between 0 (very low priority) and 10 (maximum priority) used by some particular backends

Returns

Type	Description
boolean	True if no problem

Throws

Exception	Description
\Zend_Cache_Exception

setBackend(\Zend_Cache_Backend $backendObject) : void

Set the backend

Parameters

Name	Type	Description
$backendObject	\Zend_Cache_Backend

Throws

Exception	Description
\Zend_Cache_Exception

setConfig(\Zend_Config $config) : \Zend_Cache_Core

Set options using an instance of type Zend_Config

Parameters

Name	Type	Description
$config	\Zend_Config

Returns

Type	Description
\Zend_Cache_Core

setLifetime(int $newLifetime) : void

Force a new lifetime

The new value is set for the core/frontend but for the backend too (directive)

Parameters

Name	Type	Description
$newLifetime	int	New lifetime (in seconds)

setOption(string $name, mixed $value) : void

Public frontend to set an option

There is an additional validation (relatively to the protected _setOption method)

Parameters

Name	Type	Description
$name	string	Name of the option
$value	mixed	Value of the option

Throws

Exception	Description
\Zend_Cache_Exception

test(string $id) : int | false

Test if a cache is available for the given id

Parameters

Name	Type	Description
$id	string	Cache id

Returns

Type	Description
int \| false	Last modified time of cache entry if it is available, false otherwise

touch(string $id, int $extraLifetime) : boolean

Give (if possible) an extra lifetime to the given cache id

Parameters

Name	Type	Description
$id	string	cache id
$extraLifetime	int

Returns

Type	Description
boolean	true if ok

Cache/Core.php

\Zend_Cache_Corejump to top

Constants

Properties

Methods

\Zend_Cache_Core
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