欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  php教程

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

程序员文章站 2022-05-14 21:33:34
...

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):

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

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。

您可能感兴趣的文章:

  • Zend Framework框架教程之Zend_Db_Table_Rowset用法实例分析
  • Zend Framework教程之Zend_Db_Table_Row用法实例分析
  • Zend Framework教程之Zend_Db_Table用法详解
  • Zend Framework教程之Zend_Form组件实现表单提交并显示错误提示的方法
  • Zend Framework开发入门经典教程
  • Zend Framework框架Smarty扩展实现方法
  • Zend Framework框架路由机制代码分析
  • Zend Framework实现具有基本功能的留言本(附demo源码下载)
  • Zend Framework分页类用法详解
  • Zend Framework实现多文件上传功能实例
  • Zend Framework入门之环境配置及第一个Hello World示例(附demo源码下载)
  • Zend Framework教程之连接数据库并执行增删查的方法(附demo源码下载)
  • Zend Framework教程之Zend_Db_Table表关联实例详解