复制代码代码如下:php
dir=$dirpath;$this->make_dir($this->dir);}function read($key,$minutes=1){$filename=$this->get_filename($key);if($datas = @file_get_contents($filename)){$datas = unserialize($datas);if(time() - $datas['time'] {return $datas['data'];}}return false;}function write($key,$data){$filename=$this->get_filename($key);if($handle = fopen($filename,'w+')){$datas = array('data'=>$data,'time'=>time());flock($handle,LOCK_EX);$rs = fputs($handle,serialize($datas));flock($handle,LOCK_UN);fclose($handle);if($rs!==false){return true; }}return false;}function clear_all(){$dir=$this->dir;$this->del_file($dir);}private function get_filename($key){return $this->dir.$key.'_'.md5($key.$this->key);}private function make_dir($path){if (! file_exists ( $path )){$this->make_dir ( dirname ( $path ) );if (! mkdir ( $path, 0777 )) die ( '无法创建缓存文件夹' . $path );}}private function del_file($dir){if (is_dir($dir)){$dh=opendir($dir);//打开目录 //列出目录中的所有文件并去掉 . 和 ..
while (false !== ( $file = readdir ($dh))) {if($file!="." && $file!="..") {$fullpath=$dir."/".$file;if(!is_dir($fullpath)) {unlink($fullpath);} else {$this->del_file($fullpath);}}}closedir($dh);}}}$cache = new cache();$cache->set_dir('data/cache_dir/');$data=$cache->read('sys',1);if(empty($data)){$data=array('aa'=>1111,'bb'=>2222,'date'=>date('Y-m-d H:i:s'));$cache->write('sys',$data);}print_r($data);