发一个修改过的缓存静态页面的类，包括实例示例。

<?php

/*
*       File name:htmlCache.php
*       modified by:xuhongquan
*       Contact:[email protected]
*       Last modified:2010-7-14
*
*       This file does the following things:
*       -在原来缓存的基本上作了一些修改
*       -保证一定能够缓存成功
*       -这个原本是网上找的一段代码，没有发现出处。修改了一些。重新发出来，供大家使用。
*       -在原程序的基础上增加程序的灵活性。修改一些BUG
* -不需要任何设置即可
*/

header("Content-type: text/html; charset=utf-8");

ob_start();
class HtmlCache{
                var $content = "";
                var $pre = "<?php if(!defined('IN_DISCUZ')) exit('Access Denied');\n?>";
                var $path = "cache";
                var $time = 120;
                var $type = "abcdefg";
                var $fileName = "";
                var $sfileName = "";
                var $url = "";
                var $basepath = "";

 //构造函数
 function ArrCache($path =null,$time =null ,$type =null){
                        $this->path = ($path==null||$path=='')?$this->path:$path;
                        $this->time = ($time==null||$time=='')?$this->time:$time;
                        $this->fileType = ($type==null||$type=='')?$this->type:$type;
                        $this->getFile();
                        $this->basepath=$_SERVER['DOCUMENT_ROOT'].DIRECTORY_SEPARATOR.$this->path.DIRECTORY_SEPARATOR;
                        $this->fileName =$this->basepath.md5($this->url).'.'.$this->fileType;
                        $this->sfileName =$this->basepath.$this->url.'.'.$this->fileType;
                        if (file_exists($this->fileName) && ((filemtime($this->fileName)+$this->time) > time())) {
                                         $fp = fopen($this->fileName,"r");
                                         $this->content=rawurldecode(fread($fp,filesize($this->fileName)));
                                         fclose($fp);
                                         ob_end_flush();
                                         return $this->content;
                        }
 }

 function getFile($url=null){//取对应的url文件
                if($url==null||$url==''){
                                        $port=$_SERVER['SERVER_PORT']==80?'':':'.$_SERVER['SERVER_PORT'];
                                        $this->url='http://'.$_SERVER['SERVER_NAME'].$port.$_SERVER['SCRIPT_NAME'].'?'.$_SERVER['QUERY_STRING'];
                }else{
                                $this->url=$url;
                }
 } // end func


 function endCache() {
                $data=ob_get_contents();
                $data=rawurlencode($data);
                $this->writefile($this->fileName, $data);
                ob_end_flush();
 }

        function writefile($file, $str) {
                if(empty($str)) return false;
                $path=pathinfo($file);
                if($path['dirname']) {
                                $this->mkdirs($path['dirname']);
                }
                $fp = fopen($file, 'wb+');
                if ($fp) {
                        fwrite($fp, $str);
                        fclose($fp);
                        return true;
                } else {
                        return false;
                }
        }

        function mkdirs($dir, $mode = 0777){
                if (!is_dir($dir)) {
                        $this->mkdirs(dirname($dir), $mode);
                        return mkdir($dir, $mode);
                }
                return true;
        }
}//end class
?>

 
用法示例

/*
*       File name:testHtml.php
*       Create by:xuhongquan
*       Contact:[email protected]
*       Last modified:2010-7-14
*
*       This file does the following things:
*       -这个文档是对缓存用法示例
*       
*/

header("Content-type: text/html; charset=utf-8");
require_once('htmlCache.php');
$cache = new HtmlCache('cache/html');
$con=$cache->content;
if(!empty($con)){
                echo $con;//直接输出原来缓存的内容。
}else{
/*
这部分原就是你原来的流程，比方，你原来是查询输出之类。
这个函数就相当于把结果页面缓存起来，下次用户访问的时间好用。
*/
                $cache->endCache();
}
?>

 修改天有空了，再完善一下。作一个缓存数据库的。