128 lines
3.3 KiB
PHP
128 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\driver;
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use think\Cache;
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/**
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* 文件类型缓存类
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* @author liu21st <liu21st@gmail.com>
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*/
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class Lite
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{
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protected $options = [
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'prefix' => '',
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'path' => '',
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'expire' => 0, // 等于 10*365*24*3600（10年）
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];
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/**
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* 架构函数
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* @access public
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*
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* @param array $options
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*/
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public function __construct($options = [])
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{
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if (!empty($options)) {
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$this->options = array_merge($this->options, $options);
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}
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if (substr($this->options['path'], -1) != '/') {
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$this->options['path'] .= '/';
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}
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}
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/**
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* 取得变量的存储文件名
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* @access private
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* @param string $name 缓存变量名
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* @return string
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*/
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private function filename($name)
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{
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return $this->options['path'] . $this->options['prefix'] . md5($name) . '.php';
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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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$filename = $this->filename($name);
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if (is_file($filename)) {
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// 判断是否过期
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$mtime = filemtime($filename);
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if ($mtime < $_SERVER['REQUEST_TIME']) {
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// 清除已经过期的文件
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unlink($filename);
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return false;
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}
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return include $filename;
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} else {
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return false;
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}
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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 int $expire 有效时间 0为永久
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* @return bool
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*/
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public function set($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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// 模拟永久
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if (0 === $expire) {
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$expire = 10 * 365 * 24 * 3600;
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}
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$filename = $this->filename($name);
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$ret = file_put_contents($filename, ("<?php return " . var_export($value, true) . ";"));
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// 通过设置修改时间实现有效期
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if ($ret) {
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touch($filename, $_SERVER['REQUEST_TIME'] + $expire);
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}
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return $ret;
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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 unlink($this->filename($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 bool
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* @internal param string $name 缓存变量名
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*/
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public function clear()
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{
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$filename = $this->filename('*');
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array_map("unlink", glob($filename));
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}
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}
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