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