一个简单至极的PHP缓存类代码

网上关于 PHP 缓存类的资料很多，不过这个类应该是我见过功能满足需求，但又无比简洁的一个。废话不多说，直接看代码吧！使用说明：1、实例化$cache = new Cache(); 2、设置缓存时间和缓存目录$cache = new Cache(60, "/any_other_path/"); 第一个参数是缓存秒数，第二个参数是缓存路径，根据需要配置。默认情况下，缓存时间是 3600 秒，缓存目录是 cache/3、读取缓存$value = $cache->get("data_key"); 4、写入缓存$value = $cache->put("data_key", "data_value"); 完整实例：

$cache = new Cache();  //从缓存从读取键值 $key 的数据 $values = $cache->get($key);  //如果没有缓存数据 if ($values == false) { //insert code here... //写入键值 $key 的数据 $cache->put($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 } } ?> 

相信大家一定会喜欢这个简洁的php缓存类代码，希望对大家的学习有所帮助。