苗启源的部落格

前几天写过一篇巧用404.php解决Wordpress耗资源的问题，给Wordpress加个缓存功能(http://www.miaoqiyuan.cn/p/wordpress-haoziyuan-wordpress-cache)中提到了PHP缓存的方法，总感觉不是很方便，现在我又写了一个新的。

< ?php
class cache404{
public $K,$P;
public function __construct($URI,$P='blog',$Par='./cache/'){
$this->U = $URI;
$this->K = md5($URI);
$this->P = $P;
$this->Par = $Par;
$this->E = ‘.tmp_miaoqiyuan’;
$this->F = $this->Par . $this->P . ‘/’ . $this->K . $this->E;
}
public function getCache(){
if(!!($fp=@fopen($this->F,’r'))){
$html=fread($fp,102400);
}else{
$html=file_get_contents($this->U);
$this->addIndex();
$fp=fopen($this->F,’w');
fwrite($fp,$html);
}
fclose($fp);
return $html;
}
public function noCache(){
$html=file_get_contents($this->U);
$fp=fopen($this->F,’w');
fwrite($fp,$html);
fclose($fp);
return $html;
}
public function flushCache(){
unlink($this->F);
}
public function addIndex(){
$fpidx=fopen($this->Par . $this->P . ‘.rtf’,'a’);
fwrite($fpidx,$this->K . ‘ ‘ .$this->U);
fclose($fpidx);
}
}
?>

用的时候很简单

require_once(‘./inc/404cache.php’);
$Cache=new cache404($URI,$Path);
#echo $Cache->noCache();
echo $Cache->getCache();

< ?php
require_once('./inc/404cache.php');
$q=explode("/",$URI=substr(($qs = strtolower($_SERVER['QUERY_STRING'])),strpos($qs, ':80')+4));
$URI="/".$URI;
switch($q[0]){
case 'test':
#/test -> /seo_test/test.asp
if(preg_match(‘/^\/test(\/)?$/’,$URI)){
$URI=’http:’.'//’.$_SERVER['SERVER_NAME'].’/seo_test/test.asp’;
}

#/test/[a-z]\.html -> /seo_test/test.asp?key=$1
else [...]