不缓存页面对于数据实时性要求很强的功能来说很重要，以下是 HTML、ASP、PHP 强制不缓存页面的代码。

HTML 强制页面不缓存代码

<!-- no cache headers -->

<meta http-equiv="Pragma" content="no-cache">

<meta http-equiv="no-cache">

<meta http-equiv="Expires" content="-1">

<meta http-equiv="Cache-Control" content="no-cache">

<!-- end no cache headers -->

ASP 强制页面不缓存代码

Response.Buffer = True

Response.Expires = 0

Response.ExpiresAbsolute = Now() - 1

Response.CacheControl = "no-cache"

Response.AddHeader "Expires",Date()

Response.AddHeader "Pragma","no-cache"

Response.AddHeader "Cache-Control","private, no-cache, must-revalidate"

PHP 强制页面不缓存代码

以下代码即可强制浏览器不缓存页面内容，适用于 HTTP/1.0 及 HTTP/1.1

header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');  

header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');  

header('Cache-Control: no-store, no-cache, must-revalidate');  

header('Cache-Control: post-check=0, pre-check=0', false );  

header('Pragma: no-cache');