A simple PHP Cache code

This article shares with you an extremely simple PHP Cache code. cache applications are especially important for php project development, for more information about the PHP Cache class on the Internet, please refer to this class. However, this class should be a simple one that I have seen to meet the functional requirements. Let's just look at the code!
Instructions for use:
1. instantiation
$ Cache = new Cache ();
2. set cache time and cache Directory
$ Cache = new Cache (60, '/any_other_path /');
The first parameter is the cache seconds, and the second parameter is the cache path, which can be configured as needed.
By default, the cache duration is 3600 seconds, and the cache directory is cache/
3. read cache
$ Value = $ cache-> get ('data _ key ');
4. write cache
$ Value = $ cache-> put ('data _ key', 'data _ value ');
Complete instance:

$ Cache = new Cache (); // read key value $ key data from the cache $ values = $ cache-> get ($ key ); // if no data is cached if ($ values = false) {// insert code here... // write $ key Data $ cache-> put ($ key, $ values);} else {// insert code here ...}

Cache. class. php

<?php class Cache { private $cache_path;//path for the cache private $cache_expire;//seconds that the cache expires  //cache constructor, optional expiring time and cache path public function Cache($exp_time=3600,$path="cache/"){ $this->cache_expire=$exp_time; $this->cache_path=$path; }  //returns the filename for the cache private function fileName($key){ return $this->cache_path.md5($key); }  //creates new cache files with the given data, $key== name of the cache, data the info/values to store public function put($key, $data){ $values = serialize($data); $filename = $this->fileName($key); $file = fopen($filename, 'w'); if ($file){//able to create the file fwrite($file, $values); fclose($file); } else return false; }  //returns cache for the given key public function get($key){ $filename = $this->fileName($key); if (!file_exists($filename) || !is_readable($filename)){//can't read the cache return false; } if ( time() < (filemtime($filename) + $this->cache_expire) ) {//cache for the key not expired $file = fopen($filename, "r");// read data file if ($file){//able to open the file $data = fread($file, filesize($filename)); fclose($file); return unserialize($data);//return the values } else return false; } else return false;//was expired you need to create new } } ?> 

I believe everyone will love this concise php Cache code and hope it will be helpful for everyone's learning.