Memcached.class.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2013 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 何辉 <runphp@qq.com>
// +----------------------------------------------------------------------
namespace Think\Cache\Driver;
use Memcached as MemcachedResource;
use Think\Cache;
/**
* Memcached缓存驱动
*/
class Memcached extends Cache
{
/**
*
* @param array $options
*/
public function __construct($options = array())
{
if (! extension_loaded('memcached')) {
E(L('_NOT_SUPPORT_') . ':memcached');
}
$options = array_merge(array(
'servers' => C('MEMCACHED_SERVER') ? : null,
'lib_options' => C('MEMCACHED_LIB') ? : null
), $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;
$this->handler = new MemcachedResource();
$options['servers'] && $this->handler->addServers($options['servers']);
$options['lib_options'] && $this->handler->setOptions($options['lib_options']);
}
/**
* 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, time() + $expire)) {
if ($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();
}
}