<?php
class File {
private $_dir;
const EXT = '.txt';
public function __construct() {
$this->_dir = dirname(__FILE__) . '/files/';
}
public function cacheData($key, $value = '', $cacheTime = 0) {
$filename = $this->_dir . $key . self::EXT;
if($value !== '') { // 将value值写入缓存
if(is_null($value)) { //$value 为null 将删除缓存
return @unlink($filename);
}
//目录不存在建立目录
$dir = dirname($filename);
if(!is_dir($dir)) {
mkdir($dir, 0777);
}
//设置定长缓存时间，保存到缓存文件中
$cacheTime = sprintf('%011d', $cacheTime);
return file_put_contents($filename,$cacheTime . json_encode($value));
}This is a PHP file caching library, friends who need it can download and use
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