php静态缓存提升网站访问速度的实现代码

<?php
/**
 * 清空缓存代码
 * bbs.it-home.org
*/
if($_GET['phphuancun']!="true"){
define("HC_PATH",dirname(__FILE__)."/cache/");
define("HC_TIME",1);
echo HC_getcache();exit;
}
function HC_getcache($iscache='')
{
$url="http://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
$cacheurl=strpos($url,"?")?$url."&phphuancun=true":$url."?phphuancun=true";
$cachename=HC_PATH.md5($url).".c";
 
$cachetime=$iscache?time()+1:time()-(HC_TIME * 60*60);
if(file_exists($cachename) && filemtime($cachename)>=$cachetime){
$return=file_get_contents($cachename);$data=function_exists(gzcompress)?@gzuncompress($return):$return;
return unserialize($data);
}else{$return=file_get_contents($cacheurl);HC_writecache($cachename,$return);return $return;}
 
}
function HC_writecache($name,$array)
{
function_exists(gzcompress)?$return =gzcompress(serialize($array)):$return=serialize($array);
@file_put_contents($name,$return);
}
?>