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?>
<div id="book.memcached" class="book">
 
 <h1 class="title">Memcached</h1>
 

 <div id="intro.memcached" class="preface">
  <h1 class="title">简介</h1>
  <p class="para">
   <a href="http://www.memcached.org/" class="link external">&raquo;&nbsp;memcached</a> 是一个高性能分布式的内存对象缓存系统，
   通常被用于降低数据库加载压力以提高动态 web 应用的响应速度。
  </p>
  <p class="para">
  此扩展使用了 libmemcached 库提供的 api 与 memcached 服务端进行交互。它同样提供了一个 session 处理程序（memcached）。
  它同时提供了一个 <a href="ref.session.php" class="link">session</a> 处理程序（<code class="literal">memcached</code>）。
  </p>
  <p class="para">
   关于 libmemcached 的更多信息可以在<a href="http://libmemcached.org/libMemcached.html" class="link external">&raquo;&nbsp;http://libmemcached.org/libMemcached.html</a>查看。
  </p>
 </div>

 








 







 







 






 






 






 







<ul class="chunklist chunklist_book"><li><a href="memcached.setup.php">安装/配置</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="memcached.requirements.php">需求</a></li><li><a href="memcached.installation.php">安装</a></li><li><a href="memcached.configuration.php">运行时配置</a></li></ul></li><li><a href="memcached.constants.php">预定义常量</a></li><li><a href="memcached.expiration.php">超时时间</a></li><li><a href="memcached.callbacks.php">回调</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="memcached.callbacks.result.php">结果回调</a></li><li><a href="memcached.callbacks.read-through.php">通读缓存回调</a></li></ul></li><li><a href="memcached.sessions.php">Sessions支持</a></li><li><a href="class.memcached.php">Memcached</a> — Memcached 类<ul class="chunklist chunklist_book chunklist_children"><li><a href="memcached.add.php">Memcached::add</a> — 向新 key 添加元素</li><li><a href="memcached.addbykey.php">Memcached::addByKey</a> — 在特定服务器上向新 key 添加元素</li><li><a href="memcached.addserver.php">Memcached::addServer</a> — 向服务器池增加服务器</li><li><a href="memcached.addservers.php">Memcached::addServers</a> — 向服务器池中增加多台服务器</li><li><a href="memcached.append.php">Memcached::append</a> — 向已存在元素追加数据</li><li><a href="memcached.appendbykey.php">Memcached::appendByKey</a> — 向指定服务器上已存在元素追加数据</li><li><a href="memcached.cas.php">Memcached::cas</a> — 比较并交换值</li><li><a href="memcached.casbykey.php">Memcached::casByKey</a> — 在指定服务器上比较并交换值</li><li><a href="memcached.construct.php">Memcached::__construct</a> — 创建 Memcached 实例</li><li><a href="memcached.decrement.php">Memcached::decrement</a> — 减小数值元素的值</li><li><a href="memcached.decrementbykey.php">Memcached::decrementByKey</a> — Decrement numeric item's value, stored on a specific server</li><li><a href="memcached.delete.php">Memcached::delete</a> — 删除元素</li><li><a href="memcached.deletebykey.php">Memcached::deleteByKey</a> — 从指定的服务器删除元素</li><li><a href="memcached.deletemulti.php">Memcached::deleteMulti</a> — Delete multiple items</li><li><a href="memcached.deletemultibykey.php">Memcached::deleteMultiByKey</a> — Delete multiple items from a specific server</li><li><a href="memcached.fetch.php">Memcached::fetch</a> — 读取下一个结果</li><li><a href="memcached.fetchall.php">Memcached::fetchAll</a> — 读取所有剩余结果</li><li><a href="memcached.flush.php">Memcached::flush</a> — 作废缓存中的所有元素</li><li><a href="memcached.get.php">Memcached::get</a> — 检索元素</li><li><a href="memcached.getallkeys.php">Memcached::getAllKeys</a> — Gets the keys stored on all the servers</li><li><a href="memcached.getbykey.php">Memcached::getByKey</a> — 从特定的服务器检索元素</li><li><a href="memcached.getdelayed.php">Memcached::getDelayed</a> — 请求多个元素</li><li><a href="memcached.getdelayedbykey.php">Memcached::getDelayedByKey</a> — 从指定的服务器上请求多个元素</li><li><a href="memcached.getmulti.php">Memcached::getMulti</a> — 检索多个元素</li><li><a href="memcached.getmultibykey.php">Memcached::getMultiByKey</a> — 从特定服务器检索多个元素</li><li><a href="memcached.getoption.php">Memcached::getOption</a> — 获取 Memcached 的选项值</li><li><a href="memcached.getresultcode.php">Memcached::getResultCode</a> — 返回最后一次操作的结果代码</li><li><a href="memcached.getresultmessage.php">Memcached::getResultMessage</a> — 返回最后一次操作的结果描述消息</li><li><a href="memcached.getserverbykey.php">Memcached::getServerByKey</a> — 获取一个 key 所映射的服务器信息</li><li><a href="memcached.getserverlist.php">Memcached::getServerList</a> — 获取服务器池中的服务器列表</li><li><a href="memcached.getstats.php">Memcached::getStats</a> — 获取服务器池的统计信息</li><li><a href="memcached.getversion.php">Memcached::getVersion</a> — 获取服务器池中所有服务器的版本信息</li><li><a href="memcached.increment.php">Memcached::increment</a> — 增加数值元素的值</li><li><a href="memcached.incrementbykey.php">Memcached::incrementByKey</a> — Increment numeric item's value, stored on a specific server</li><li><a href="memcached.ispersistent.php">Memcached::isPersistent</a> — Check if a persitent connection to memcache is being used</li><li><a href="memcached.ispristine.php">Memcached::isPristine</a> — Check if the instance was recently created</li><li><a href="memcached.prepend.php">Memcached::prepend</a> — 向一个已存在的元素前面追加数据</li><li><a href="memcached.prependbykey.php">Memcached::prependByKey</a> — 在指定服务器上追加数据到已存在的元素</li><li><a href="memcached.quit.php">Memcached::quit</a> — 关闭所有打开的链接</li><li><a href="memcached.replace.php">Memcached::replace</a> — 替换已存在 key 下的元素</li><li><a href="memcached.replacebykey.php">Memcached::replaceByKey</a> — 在指定服务器上，替换已存在 key 下的元素</li><li><a href="memcached.resetserverlist.php">Memcached::resetServerList</a> — Clears all servers from the server list</li><li><a href="memcached.set.php">Memcached::set</a> — 存储一个元素</li><li><a href="memcached.setbykey.php">Memcached::setByKey</a> — 将元素存储到指定的服务器上</li><li><a href="memcached.setencodingkey.php">Memcached::setEncodingKey</a> — Set AES encryption key for data in Memcached</li><li><a href="memcached.setmulti.php">Memcached::setMulti</a> — 存储多个元素</li><li><a href="memcached.setmultibykey.php">Memcached::setMultiByKey</a> — 在指定服务器存储多个元素</li><li><a href="memcached.setoption.php">Memcached::setOption</a> — 设置一个 memcached 选项</li><li><a href="memcached.setoptions.php">Memcached::setOptions</a> — Set Memcached options</li><li><a href="memcached.setsaslauthdata.php">Memcached::setSaslAuthData</a> — Set the credentials to use for authentication</li><li><a href="memcached.touch.php">Memcached::touch</a> — Set a new expiration on an item</li><li><a href="memcached.touchbykey.php">Memcached::touchByKey</a> — Set a new expiration on an item on a specific server</li></ul></li><li><a href="class.memcachedexception.php">MemcachedException</a> — MemcachedException类</li></ul></div><?php manual_footer($setup); ?>