zend framework实现将session存储在memcache中的方法，zendmemcache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 _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！
更多关于zend相关内容感兴趣的读者可查看本站专题：《zend framework框架入门教程》、《php优秀开发框架总结》、《yii框架入门及常用技巧总结》、《thinkphp入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
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。
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