php memcache分页,Zend Framework实现将session存储在memcache中的方法

妖狐艹你老母 2022-11-18 04:58 145阅读 0赞

本文实例讲述了Zend Framework实现将session存储在memcache中的方法。分享给大家供大家参考，具体如下：

在zend framework中，已经可以将session存储在数据库中了，不过还不支持memcache，我简单得实现了一下。

下面是SaveHandler，文件名为 ：Memcached.php ，将其放在 /Zend/Session/SaveHandler 目录下，代码如下(需要有php\_memcache支持,因为字符长度限制,我把部分注释去掉了):

require\_once 'Zend/Session.php';

require\_once 'Zend/Config.php';

class Zend\_Session\_SaveHandler\_Memcached implements Zend\_Session\_SaveHandler\_Interface

const LIFETIME = 'lifetime';

const OVERRIDE\_LIFETIME = 'overrideLifetime';

const MEMCACHED = 'memcached';

protected $\_lifetime = false;

protected $\_overrideLifetime = false;

protected $\_sessionSavePath;

protected $\_sessionName;

protected $\_memcached;

/\*\*

\* Constructor

\* $config is an instance of Zend\_Config or an array of key/value pairs containing configuration options for

\* Zend\_Session\_SaveHandler\_Memcached . These are the configuration options for

\* Zend\_Session\_SaveHandler\_Memcached:

\* sessionId => The id of the current session

\* sessionName => The name of the current session

\* sessionSavePath => The save path of the current session

\* modified => (string) Session last modification time column

\* lifetime => (integer) Session lifetime (optional; default: ini\_get('session.gc\_maxlifetime'))

\* overrideLifetime => (boolean) Whether or not the lifetime of an existing session should be overridden

\* (optional; default: false)

\* @param Zend\_Config|array $config User-provided configuration

\* @return void

\* @throws Zend\_Session\_SaveHandler\_Exception

\*/

public function \_\_construct($config)

if ($config instanceof Zend\_Config) \{

$config = $config->toArray();

\} else if (!is\_array($config)) \{

/\*\*

\* @see Zend\_Session\_SaveHandler\_Exception

\*/

require\_once 'Zend/Session/SaveHandler/Exception.php';

throw new Zend\_Session\_SaveHandler\_Exception(

'$config must be an instance of Zend\_Config or array of key/value pairs containing '

. 'configuration options for Zend\_Session\_SaveHandler\_Memcached .');

foreach ($config as $key => $value) \{

do \{

switch ($key) \{

case self::MEMCACHED:

$this->createMemcached($value);

break;

case self::LIFETIME:

$this->setLifetime($value);

break;

case self::OVERRIDE\_LIFETIME:

$this->setOverrideLifetime($value);

break;

default:

// unrecognized options passed to parent::\_\_construct()

break 2;

unset($config\[$key\]);

\} while (false);

/\*\*

\* 创建memcached连接对象

\* @return void

\*/

public function createMemcached($config)\{

$mc = new Memcache;

foreach ($config as $value)\{

$mc->addServer($value\['ip'\], $value\['port'\]);

$this->\_memcached = $mc;

public function \_\_destruct()

Zend\_Session::writeClose();

/\*\*

\* Set session lifetime and optional whether or not the lifetime of an existing session should be overridden

\* $lifetime === false resets lifetime to session.gc\_maxlifetime

\* @param int $lifetime

\* @param boolean $overrideLifetime (optional)

\* @return Zend\_Session\_SaveHandler\_Memcached

\*/

public function setLifetime($lifetime, $overrideLifetime = null)

if ($lifetime < 0) \{

/\*\*

\* @see Zend\_Session\_SaveHandler\_Exception

\*/

require\_once 'Zend/Session/SaveHandler/Exception.php';

throw new Zend\_Session\_SaveHandler\_Exception();

\} else if (empty($lifetime)) \{

$this->\_lifetime = (int) ini\_get('session.gc\_maxlifetime');

\} else \{

$this->\_lifetime = (int) $lifetime;

if ($overrideLifetime != null) \{

$this->setOverrideLifetime($overrideLifetime);

return $this;

/\*\*

\* Retrieve session lifetime

\* @return int

\*/

public function getLifetime()

return $this->\_lifetime;

/\*\*

\* Set whether or not the lifetime of an existing session should be overridden

\* @param boolean $overrideLifetime

\* @return Zend\_Session\_SaveHandler\_Memcached

\*/

public function setOverrideLifetime($overrideLifetime)

$this->\_overrideLifetime = (boolean) $overrideLifetime;

return $this;

public function getOverrideLifetime()

return $this->\_overrideLifetime;

/\*\*

\* Retrieve session lifetime considering

\* @param array $value

\* @return int

\*/

public function open($save\_path, $name)

$this->\_sessionSavePath = $save\_path;

$this->\_sessionName = $name;

return true;

/\*\*

\* Retrieve session expiration time

\* @param \* @param array $value

\* @return int

\*/

public function close()

return true;

public function read($id)

$return = '';

$value = $this->\_memcached->get($id); //获取数据

if ($value) \{

if ($this->\_getExpirationTime($value) > time()) \{

$return = $value\['data'\];

\} else \{

$this->destroy($id);

return $return;

public function write($id, $data)

$return = false;

$insertDate = array('modified' => time(),

'data' => (string) $data);

$value = $this->\_memcached->get($id); //获取数据

if ($value) \{

$insertDate\['lifetime'\] = $this->\_getLifetime($value);

if ($this->\_memcached->replace($id,$insertDate)) \{

$return = true;

\} else \{

$insertDate\['lifetime'\] = $this->\_lifetime;

if ($this->\_memcached->add($id, $insertDate,false,$this->\_lifetime)) \{

$return = true;

return $return;

public function destroy($id)

$return = false;

if ($this->\_memcached->delete($id)) \{

$return = true;

return $return;

public function gc($maxlifetime)

return true;

protected function \_getLifetime($value)

$return = $this->\_lifetime;

if (!$this->\_overrideLifetime) \{

$return = (int) $value\['lifetime'\];

return $return;

protected function \_getExpirationTime($value)

return (int) $value\['modified'\] + $this->\_getLifetime($value);

配置(可以添加多台memcache服务器，做分布式):

$config = array(

'memcached'=> array(

array(

'ip'=>'192.168.0.1',

'port'=>11211

)

'lifetime' =>123334

);

//create your Zend\_Session\_SaveHandler\_DbTable and

//set the save handler for Zend\_Session

Zend\_Session::setSaveHandler(new Zend\_Session\_SaveHandler\_Memcached($config));

//start your session!

Zend\_Session::start();

配置好后，session的使用方法和以前一样，不用管底层是怎么实现的！

希望本文所述对大家基于Zend Framework框架的PHP程序设计有所帮助。

php memcache分页,Zend Framework实现将session存储在memcache中的方法

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