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128 lines
3.7 KiB
PHP
128 lines
3.7 KiB
PHP
<?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) 2006~2015 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\cache\driver;
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use think\Exception;
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/**
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* Redis缓存驱动
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* 要求安装phpredis扩展：https://github.com/nicolasff/phpredis
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* @author 尘缘 <130775@qq.com>
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*/
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class Redis
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{
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protected $handler = null;
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protected $options = [
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'host' => '127.0.0.1',
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'port' => 6379,
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'timeout' => false,
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'expire' => 0,
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'persistent' => false,
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'length' => 0,
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];
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/**
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* 架构函数
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* @param array $options 缓存参数
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* @access public
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*/
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public function __construct($options = [])
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{
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if (!extension_loaded('redis')) {
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throw new Exception('_NOT_SUPPERT_:redis');
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}
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if (!empty($options)) {
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$this->options = array_merge($this->options, $options);
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}
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$func = $options['persistent'] ? 'pconnect' : 'connect';
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$this->handler = new \Redis;
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false === $options['timeout'] ?
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$this->handler->$func($options['host'], $options['port']) :
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$this->handler->$func($options['host'], $options['port'], $options['timeout']);
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}
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/**
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* 读取缓存
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* @access public
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* @param string $name 缓存变量名
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* @return mixed
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*/
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public function get($name)
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{
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return $this->handler->get($this->options['prefix'] . $name);
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}
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/**
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* 写入缓存
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* @access public
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* @param string $name 缓存变量名
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* @param mixed $value 存储数据
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* @param integer $expire 有效时间（秒）
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* @return boolean
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*/
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public function set($name, $value, $expire = null)
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{
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if (is_null($expire)) {
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$expire = $this->options['expire'];
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}
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$name = $this->options['prefix'] . $name;
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if (is_int($expire)) {
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$result = $this->handler->setex($name, $expire, $value);
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} else {
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$result = $this->handler->set($name, $value);
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}
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if ($result && $this->options['length'] > 0) {
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if ($this->options['length'] > 0) {
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// 记录缓存队列
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$queue = $this->handler->get('__info__');
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if (!$queue) {
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$queue = [];
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}
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if (false === array_search($name, $queue)) {
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array_push($queue, $name);
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}
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if (count($queue) > $this->options['length']) {
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// 出列
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$key = array_shift($queue);
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// 删除缓存
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$this->handler->delete($key);
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}
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$this->handler->set('__info__', $queue);
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}
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}
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return $result;
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}
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/**
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* 删除缓存
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* @access public
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* @param string $name 缓存变量名
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* @return boolean
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*/
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public function rm($name)
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{
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return $this->handler->delete($this->options['prefix'] . $name);
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}
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/**
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* 清除缓存
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* @access public
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* @return boolean
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*/
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public function clear()
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{
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return $this->handler->flushDB();
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}
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}
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