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133 lines
3.3 KiB
PHP
133 lines
3.3 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) 2006~2016 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;
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/**
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* 缓存基础类
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*/
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abstract class Driver
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{
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protected $options = [];
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protected $tag;
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/**
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* 判断缓存是否存在
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* @access public
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* @param string $name 缓存变量名
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* @return bool
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*/
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abstract public function has($name);
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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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* @param mixed $default 默认值
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* @return mixed
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*/
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abstract public function get($name, $default = false);
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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 int $expire 有效时间 0为永久
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* @return boolean
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*/
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abstract public function set($name, $value, $expire = null);
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/**
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* 自增缓存（针对数值缓存）
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* @access public
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* @param string $name 缓存变量名
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* @param int $step 步长
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* @return false|int
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*/
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abstract public function inc($name, $step = 1);
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/**
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* 自减缓存（针对数值缓存）
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* @access public
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* @param string $name 缓存变量名
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* @param int $step 步长
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* @return false|int
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*/
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abstract public function dec($name, $step = 1);
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/**
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* 删除缓存
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* @access public
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* @param string $name 缓存变量名
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* @return boolean
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*/
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abstract public function rm($name);
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/**
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* 清除缓存
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* @access public
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* @param string $tag 标签名
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* @return boolean
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*/
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abstract public function clear($tag = null);
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/**
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* 缓存标签
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* @access public
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* @param string $name 标签名
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* @return $this
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*/
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public function tag($name)
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{
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$this->tag = $name;
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return $this;
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}
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/**
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* 更新标签
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* @access public
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* @param string $name 缓存标识
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* @return void
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*/
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protected function setTagItem($name)
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{
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if ($this->tag) {
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$key = 'tag_' . md5($this->tag);
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$this->tag = null;
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if ($this->has($key)) {
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$value = $this->get($key);
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$value .= ',' . $name;
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} else {
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$value = $name;
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}
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$this->set($key, $value);
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}
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}
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/**
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* 获取标签包含的缓存标识
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* @access public
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* @param string $tag 缓存标签
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* @return array
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*/
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protected function getTagItem($tag)
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{
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$key = 'tag_' . md5($tag);
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$value = $this->get($key);
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if ($value) {
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return explode(',', $value);
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} else {
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return [];
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}
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}
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}
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