Redis.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;
/**
* Redis缓存驱动
* 要求安装phpredis扩展：https://github.com/nicolasff/phpredis
*/
class Redis extends Cache
{
/**
* 架构函数
* @param array $options 缓存参数
* @access public
*/
public function __construct($options = array())
{
if (!extension_loaded('redis')) {
E(L('_NOT_SUPPORT_') . ':redis');
}
$options = array_merge(array(
'host' => C('REDIS_HOST') ?: '127.0.0.1',
'port' => C('REDIS_PORT') ?: 6379,
'password' => C('REDIS_PASSWORD') ?: '',
'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 \Redis;
false === $options['timeout'] ?
$this->handler->$func($options['host'], $options['port']) :
$this->handler->$func($options['host'], $options['port'], $options['timeout']);
if ('' != $options['password']) {
$this->handler->auth($options['password']);
}
}
/**
* 读取缓存
* @access public
* @param string $name 缓存变量名
* @return mixed
*/
public function get($name)
{
N('cache_read', 1);
$value = $this->handler->get($this->options['prefix'] . $name);
$jsonData = json_decode($value, true);
return (null === $jsonData) ? $value : $jsonData; //检测是否为JSON数据 true 返回JSON解析数组, false返回源数据
}
/**
* 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;
//对数组/对象数据进行缓存处理，保证数据完整性
$value = (is_object($value) || is_array($value)) ? json_encode($value) : $value;
if (is_int($expire) && $expire) {
$result = $this->handler->setex($name, $expire, $value);
} else {
$result = $this->handler->set($name, $value);
}
if ($result && $this->options['length'] > 0) {
// 记录缓存队列
$this->queue($name);
}
return $result;
}
/**
* 删除缓存
* @access public
* @param string $name 缓存变量名
* @return boolean
*/
public function rm($name)
{
return $this->handler->delete($this->options['prefix'] . $name);
}
/**
* 清除缓存
* @access public
* @return boolean
*/
public function clear()
{
return $this->handler->flushDB();
}
}