# Class yii\caching\MemCacheServer

Inheritance | yii\caching\MemCacheServer » yii\base\BaseObject
Implements | yii\base\Configurable
Available since version | 2.0
Source Code | https://github.com/yiisoft/yii2/blob/master/framework/caching/MemCacheServer.php

MemCacheServer represents the configuration data for a single memcache or memcached server.

See PHP manual for detailed explanation of each configuration property.

For more details and usage information on Cache, see the guide article on caching.

## Public Properties

Hide inherited properties

Property | Type | Description | Defined By
--- | --- | --- | ---
$failureCallback | Closure | This callback function will run upon encountering an error. | yii\caching\MemCacheServer
$host | string | Memcache server hostname or IP address | yii\caching\MemCacheServer
$persistent | boolean | Whether to use a persistent connection. | yii\caching\MemCacheServer
$port | integer | Memcache server port | yii\caching\MemCacheServer
$retryInterval | integer | How often a failed server will be retried (in seconds). | yii\caching\MemCacheServer
$status | boolean | If the server should be flagged as online upon a failure. | yii\caching\MemCacheServer
$timeout | integer | Timeout in milliseconds which will be used for connecting to the server. | yii\caching\MemCacheServer
$weight | integer | Probability of using this server among all servers. | yii\caching\MemCacheServer

## Public Methods

Hide inherited methods

Method | Description | Defined By
--- | --- | ---
__call() | Calls the named method which is not a class method. | yii\base\BaseObject
__construct() | Constructor. | yii\base\BaseObject
__get() | Returns the value of an object property. | yii\base\BaseObject
__isset() | Checks if a property is set, i.e. defined and not null. | yii\base\BaseObject
__set() | Sets value of an object property. | yii\base\BaseObject
__unset() | Sets an object property to null. | yii\base\BaseObject
canGetProperty() | Returns a value indicating whether a property can be read. | yii\base\BaseObject
canSetProperty() | Returns a value indicating whether a property can be set. | yii\base\BaseObject
className() | Returns the fully qualified name of this class. | yii\base\BaseObject
hasMethod() | Returns a value indicating whether a method is defined. | yii\base\BaseObject
hasProperty() | Returns a value indicating whether a property is defined. | yii\base\BaseObject
init() | Initializes the object. | yii\base\BaseObject

## Property Details

$failureCallback public property

This callback function will run upon encountering an error. The callback is run before fail over is attempted. The function takes two parameters, the $host and the $port of the failed server. This is used by memcache only.

public Closure $failureCallback = null
$host public property

Memcache server hostname or IP address

public string $host = null
$persistent public property

Whether to use a persistent connection. This is used by memcache only.

public boolean $persistent = true
$port public property

Memcache server port

public integer $port = 11211
$retryInterval public property

How often a failed server will be retried (in seconds). This is used by memcache only.

public integer $retryInterval = 15
$status public property

If the server should be flagged as online upon a failure. This is used by memcache only.

public boolean $status = true
$timeout public property

Timeout in milliseconds which will be used for connecting to the server. This is used by memcache only. For old versions of memcache that only support specifying timeout in seconds this will be rounded up to full seconds.

public integer $timeout = 1000
$weight public property

Probability of using this server among all servers.

public integer $weight = 1