Memcache.class.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Think\Cache\Driver;
use Think\Cache;
defined('THINK_PATH') or exit();
/**
* Memcache缓存驱动
*/
class Memcache extends Cache
{
/**
* 架构函数
*
* @param array $options
* 缓存参数
* @access public
*/
function __construct($options = array())
{
if (! extension_loaded('memcache')) {
E(L('_NOT_SUPPORT_') . ':memcache');
}
$options = array_merge(array(
'host' => C('MEMCACHE_HOST') ? : '127.0.0.1',
'port' => C('MEMCACHE_PORT') ? : 11211,
'timeout' => C('DATA_CACHE_TIMEOUT') ? : false,
'persistent' => false
), $options);
$this->options = $options;
$this->options['expire'] = isset($options['expire']) ? $options['expire'] : C('DATA_CACHE_TIME');
$this->options['prefix'] = isset($options['prefix']) ? $options['prefix'] : C('DATA_CACHE_PREFIX');
$this->options['length'] = isset($options['length']) ? $options['length'] : 0;
$func = $options['persistent'] ? 'pconnect' : 'connect';
$this->handler = new \Memcache();
$options['timeout'] === false ? $this->handler->$func($options['host'], $options['port']) : $this->handler->$func($options['host'], $options['port'], $options['timeout']);
}
/**
* 读取缓存
*
* @access public
* @param string $name
* 缓存变量名
* @return mixed
*/
public function get($name)
{
N('cache_read', 1);
return $this->handler->get($this->options['prefix'] . $name);
}
/**
* 写入缓存
*
* @access public
* @param string $name
* 缓存变量名
* @param mixed $value
* 存储数据
* @param integer $expire
* 有效时间（秒）
* @return boolean
*/
public function set($name, $value, $expire = null)
{
N('cache_write', 1);
if (is_null($expire)) {
$expire = $this->options['expire'];
}
$name = $this->options['prefix'] . $name;
if ($this->handler->set($name, $value, 0, $expire)) {
if ($this->options['length'] > 0) {
// 记录缓存队列
$this->queue($name);
}
return true;
}
return false;
}
/**
* 删除缓存
*
* @access public
* @param string $name
* 缓存变量名
* @return boolean
*/
public function rm($name, $ttl = false)
{
$name = $this->options['prefix'] . $name;
return $ttl === false ? $this->handler->delete($name) : $this->handler->delete($name, $ttl);
}
/**
* 清除缓存
*
* @access public
* @return boolean
*/
public function clear()
{
return $this->handler->flush();
}
}