<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace think\session\driver;
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use SessionHandler;
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use think\Exception;
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class Memcached extends SessionHandler
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{
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protected $handler = null;
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protected $config = [
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'host' => '127.0.0.1', // memcache主机
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'port' => 11211, // memcache端口
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'expire' => 3600, // session有效期
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'timeout' => 0, // 连接超时时间（单位：毫秒）
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'session_name' => '', // memcache key前缀
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'username' => '', //账号
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'password' => '', //密码
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];
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public function __construct($config = [])
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{
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$this->config = array_merge($this->config, $config);
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}
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/**
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* 打开Session
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* @access public
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* @param string $savePath
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* @param mixed $sessName
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*/
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public function open($savePath, $sessName)
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{
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// 检测php环境
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if (!extension_loaded('memcached')) {
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throw new Exception('not support:memcached');
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}
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$this->handler = new \Memcached;
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// 设置连接超时时间（单位：毫秒）
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if ($this->config['timeout'] > 0) {
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$this->handler->setOption(\Memcached::OPT_CONNECT_TIMEOUT, $this->config['timeout']);
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}
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// 支持集群
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$hosts = explode(',', $this->config['host']);
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$ports = explode(',', $this->config['port']);
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if (empty($ports[0])) {
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$ports[0] = 11211;
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}
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// 建立连接
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$servers = [];
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foreach ((array) $hosts as $i => $host) {
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$servers[] = [$host, (isset($ports[$i]) ? $ports[$i] : $ports[0]), 1];
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}
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$this->handler->addServers($servers);
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if ('' != $this->config['username']) {
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$this->handler->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
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$this->handler->setSaslAuthData($this->config['username'], $this->config['password']);
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}
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return true;
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}
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/**
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* 关闭Session
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* @access public
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*/
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public function close()
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{
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$this->gc(ini_get('session.gc_maxlifetime'));
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$this->handler->quit();
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$this->handler = null;
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return true;
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}
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/**
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* 读取Session
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* @access public
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* @param string $sessID
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*/
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public function read($sessID)
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{
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return (string) $this->handler->get($this->config['session_name'] . $sessID);
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}
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/**
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* 写入Session
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* @access public
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* @param string $sessID
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* @param String $sessData
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* @return bool
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*/
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public function write($sessID, $sessData)
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{
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return $this->handler->set($this->config['session_name'] . $sessID, $sessData, $this->config['expire']);
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}
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/**
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* 删除Session
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* @access public
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* @param string $sessID
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* @return bool
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*/
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public function destroy($sessID)
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{
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return $this->handler->delete($this->config['session_name'] . $sessID);
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}
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/**
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* Session 垃圾回收
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* @access public
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* @param string $sessMaxLifeTime
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* @return true
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*/
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public function gc($sessMaxLifeTime)
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{
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return true;
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}
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}
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