Home  >  Article  >  php教程  >  一个简单至极的PHP缓存类代码,至极php缓存

一个简单至极的PHP缓存类代码,至极php缓存

ringa_lee
ringa_leeOriginal
2017-08-12 10:32:441234browse


一个简单至极的PHP缓存类代码,至极php缓存


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

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。

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn