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<?php

/*
*	File name:htmlCache.php
*	modified by:xuhongquan
*	Contact:xhq6632@126.com
*	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
?>

/*
*	File name:testHtml.php
*	Create by:xuhongquan
*	Contact:xhq6632@126.com
*	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();
}
?>