php实现缓存类代码的方法：【$cache = new cache(); $values = $cache->get($key); if ($values == false) {$cache->put($key, $values)...】。
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。
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
<?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}}?>
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以上就是php如何实现缓存类代码的详细内容。