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PHP file caching library

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PHP file caching library

<?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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