DbCache

Type

Class

Namespace

craft\cache

Inherits

craft\cache\DbCache » yii\caching\DbCache » yii\caching\Cache » yii\base\Component » yii\base\BaseObject

Implements

yii\base\Configurable, yii\caching\CacheInterface

Since

3.4.14

View source

Public Properties

Property	Description
behaviors	yii\base\Behavior – List of behaviors attached to this component.
cacheTable	string – Name of the DB table to store cache content.
db	yii\db\Connection, array, string – The DB connection object or the application component ID of the DB connection.
defaultDuration	integer – Default duration in seconds before a cache entry will expire.
gcProbability	integer – The probability (parts per million) that garbage collection (GC) should be performed when storing a piece of data in the cache.
keyPrefix	string – A string prefixed to every cache key so that it is unique globally in the whole cache storage.
serializer	array, null, false – The functions used to serialize and unserialize cached data.

Protected Properties

Property	Description
isVarbinaryDataField

Public Methods

Method	Description
__call()	Calls the named method which is not a class method.
__clone()	This method is called after the object is created by cloning an existing one.
__construct()	Constructor.
__get()	Returns the value of a component property.
__isset()	Checks if a property is set, i.e. defined and not null.
__set()	Sets the value of a component property.
__unset()	Sets a component property to be null.
add()	Stores a value identified by a key into cache if the cache does not contain this key.
attachBehavior()	Attaches a behavior to this component.
attachBehaviors()	Attaches a list of behaviors to the component.
behaviors()	Returns a list of behaviors that this component should behave as.
buildKey()	Builds a normalized cache key from a given key.
canGetProperty()	Returns a value indicating whether a property can be read.
canSetProperty()	Returns a value indicating whether a property can be set.
className()	Returns the fully qualified name of this class.
delete()	Deletes a value with the specified key from cache.
detachBehavior()	Detaches a behavior from the component.
detachBehaviors()	Detaches all behaviors from the component.
ensureBehaviors()	Makes sure that the behaviors declared in behaviors() are attached to this component.
exists()	Checks whether a specified key exists in the cache.
flush()	Deletes all values from cache.
gc()	Removes the expired data values.
get()	Retrieves a value from cache with a specified key.
getBehavior()	Returns the named behavior object.
getBehaviors()	Returns all behaviors attached to this component.
getOrSet()	Method combines both set() and get() methods to retrieve value identified by a $key, or to store the result of $callable execution if there is no cache available for the $key.
hasEventHandlers()	Returns a value indicating whether there is any handler attached to the named event.
hasMethod()	Returns a value indicating whether a method is defined.
hasProperty()	Returns a value indicating whether a property is defined for this component.
init()	Initializes the DbCache component.
madd()	Stores multiple items in cache. Each item contains a value identified by a key.
mget()	Retrieves multiple values from cache with the specified keys.
mset()	Stores multiple items in cache. Each item contains a value identified by a key.
multiAdd()	Stores multiple items in cache. Each item contains a value identified by a key.
multiGet()	Retrieves multiple values from cache with the specified keys.
multiSet()	Stores multiple items in cache. Each item contains a value identified by a key.
off()	Detaches an existing event handler from this component.
offsetExists()	Returns whether there is a cache entry with a specified key.
offsetGet()	Retrieves the value from cache with a specified key.
offsetSet()	Stores the value identified by a key into cache.
offsetUnset()	Deletes the value with the specified key from cache This method is required by the interface ArrayAccess.
on()	Attaches an event handler to an event.
set()	Stores a value identified by a key into cache.
trigger()	Triggers an event.

Protected Methods

Method	Description
addValue()	Stores a value identified by a key into cache if the cache does not contain this key.
addValues()	Adds multiple key-value pairs to cache.
deleteValue()	Deletes a value with the specified key from cache This is the implementation of the method declared in the parent class.
flushValues()	Deletes all values from cache.
getDataFieldName()
getDataFieldValue()
getValue()	Retrieves a value from cache with a specified key.
getValues()	Retrieves multiple values from cache with the specified keys.
isVarbinaryDataField()
setValue()	Stores a value identified by a key in cache.
setValues()	Stores multiple key-value pairs in cache.

addValue()

Stores a value identified by a key into cache if the cache does not contain this key.

This is the implementation of the method declared in the parent class.

View source

Arguments

• $key (string) – The key identifying the value to be cached
• $value (string) – The value to be cached. Other types (if you have disabled serializer) cannot be saved.
• $duration (integer) – The number of seconds in which the cached value will expire. 0 means never expire.

Returns

boolean – True if the value is successfully stored into cache, false otherwise

setValue()

Stores a value identified by a key in cache.

This is the implementation of the method declared in the parent class.

View source

Arguments

• $key (string) – The key identifying the value to be cached
• $value (string) – The value to be cached. Other types (if you have disabled serializer) cannot be saved.
• $duration (integer) – The number of seconds in which the cached value will expire. 0 means never expire.

Returns

boolean – True if the value is successfully stored into cache, false otherwise