关于Zend Framework如何实现将session存储在memcache中

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 html' target='_blank'>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）:

$config = array( memcached = array( array( ip = 192.168.0.1 , port = 11211 lifetime = 123334//create your Zend_Session_SaveHandler_DbTable and//set the save handler for Zend_SessionZend_Session::setSaveHandler(new Zend_Session_SaveHandler_Memcached($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！

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