187 lines
5.1 KiB
PHP
187 lines
5.1 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 File
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{
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protected $options = [
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'expire' => 0,
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'cache_subdir' => false,
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'path_level' => 1,
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'prefix' => '',
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'path' => CACHE_PATH,
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'data_compress' => false,
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];
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/**
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* 架构函数
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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) != DS) {
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$this->options['path'] .= DS;
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}
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$this->init();
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}
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/**
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* 初始化检查
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* @access private
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* @return boolean
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*/
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private function init()
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{
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// 创建项目缓存目录
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if (!is_dir($this->options['path'])) {
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if (mkdir($this->options['path'], 0755, true)) {
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return true;
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}
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}
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return false;
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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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$name = md5($name);
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if ($this->options['cache_subdir']) {
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// 使用子目录
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$dir = '';
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$len = $this->options['path_level'];
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for ($i = 0; $i < $len; $i++) {
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$dir .= $name{$i} . DS;
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}
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if (!is_dir($this->options['path'] . $dir)) {
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mkdir($this->options['path'] . $dir, 0755, true);
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}
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$filename = $dir . $this->options['prefix'] . $name . '.php';
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} else {
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$filename = $this->options['prefix'] . $name . '.php';
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}
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return $this->options['path'] . $filename;
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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($filename)) {
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return false;
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}
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$content = file_get_contents($filename);
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if (false !== $content) {
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$expire = (int) substr($content, 8, 12);
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if (0 != $expire && $_SERVER['REQUEST_TIME'] > filemtime($filename) + $expire) {
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//缓存过期删除缓存文件
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$this->unlink($filename);
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return false;
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}
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$content = substr($content, 20, -3);
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if ($this->options['data_compress'] && function_exists('gzcompress')) {
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//启用数据压缩
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$content = gzuncompress($content);
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}
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$content = unserialize($content);
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return $content;
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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 $expire 有效时间 0为永久
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* @return boolean
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*/
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public function set($name, $value, $expire = null)
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{
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if (is_null($expire)) {
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$expire = $this->options['expire'];
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}
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$filename = $this->filename($name);
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$data = serialize($value);
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if ($this->options['data_compress'] && function_exists('gzcompress')) {
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//数据压缩
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$data = gzcompress($data, 3);
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}
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$data = "<?php\n//" . sprintf('%012d', $expire) . $data . "\n?>";
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$result = file_put_contents($filename, $data);
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if ($result) {
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clearstatcache();
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return true;
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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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* 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 $this->unlink($this->filename($name));
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}
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/**
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* 清除缓存
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* @access public
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* @return boolean
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*/
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public function clear()
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{
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$fileLsit = (array) glob($this->options['path'] . '*');
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foreach ($fileLsit as $path) {
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is_file($path) && unlink($path);
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}
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return true;
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}
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/**
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* 判断文件是否存在后，删除
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* @param $path
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* @return bool
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* @author byron sampson <xiaobo.sun@qq.com>
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* @return boolean
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*/
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private function unlink($path)
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{
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return is_file($path) && unlink($path);
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}
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}
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