这篇文章主要介绍“php怎么实现缓存类代码”,在日常操作中,相信很多人在php怎么实现缓存类代码问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”php怎么实现缓存类代码”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
本文操作环境:windows10系统、php 7、thinkpad t480电脑。 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。 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 <?phpclass Cache {private $cache_path;//path for the cacheprivate $cache_expire;//seconds that the cache expires //cache constructor, optional expiring time and cache pathpublic function Cache($exp_time=3600,$path="cache/"){$this->cache_expire=$exp_time;$this->cache_path=$path; } //returns the filename for the cacheprivate function fileName($key){return $this->cache_path.md5($key); } //creates new cache files with the given data, $key== name of the cache, data the info/values to storepublic function put($key, $data){ $values = serialize($data); $filename = $this->fileName($key); $file = fopen($filename, 'w');if ($file){//able to create the filefwrite($file, $values); fclose($file); }else return false; } //returns cache for the given keypublic function get($key){ $filename = $this->fileName($key);if (!file_exists($filename) || !is_readable($filename)){//can't read the cachereturn false; }if ( time() < (filemtime($filename) + $this->cache_expire) ) {//cache for the key not expired$file = fopen($filename, "r");// read data fileif ($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} }?> 到此,关于“php怎么实现缓存类代码”的学习就结束了,希望能够解决大家的疑惑。 |
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