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如何实现页面缓存

WBOY
Release： 2016-06-23 13:21:49
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各位大神，如果的动态页面是INDEX.PHP,我如何实现页面缓存呢？缓存是存在服务器吧？
例如，我的INDEX.PHP代码是这样的：



 session_start () ;
 
include("IncDB.php"); 

$result=mysql_query("SELECT * FROM mates",$link); 
$row=mysql_fetch_row($result); 
//下面是若干PHP代码最后是生成一个动态页面。

 >

我的问题是：
1、要怎么做才能把该页面缓存下来呢？因为该页面内容变化不大，但会有变化。
2、在用户打开INDEX.PHp时，先判断该页面有无页面缓存，如有则显示缓存页面，否则链接数据库显示内容。
3、缓存页面每7天自动更新一次。

我看了网上的一些介绍，如 ob_start(），我基础太差，没学会怎么用，用在哪里。。。麻烦告诉我详细的办法，而不是思路！谢谢各位大神。



回复讨论(解决方案)

把这段代码放到文件开始处 

<?php$fn = str_replace('/', '_', $_SERVER['PHP_SELF'] . '.cache';if(file_exists($fn) && time()-filemtime($fn)<7*24*60*60) {  readfile($fn);  exit;}ob_start('cache');function cache($s) {  global $fn;  file_put_contents($fn, $s);  return $s;}?>
Copy after login

是紧跟着放在

后面就可以么？谢谢！

另外，我在哪里能看到这个缓存页面呢？我怎么知道现在打开的页面是缓存页面还是原来 的动态页面呢？谢谢！

我试了，表面看，没有什么变化。不知道有没有起作用。。。

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如何实现页面缓存
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