强制浏览器缓存图像

本文介绍了强制浏览器缓存图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我生成图像，并希望浏览器缓存永远它们，而是浏览器缓存从来没有在他们所有。这是我的PHP code

I am generating the images and want browser to cache them forever, but instead browser never cache them at all. This is my php code

header('Content-type:'.$file->content_type); header('Expires: Thu, 15 Apr '.(date('Y')+10).' 20:00:00 GMT'); header('Content-Disposition: attachment; filename="'.$file->file_name.'"'); echo(file_get_contents($model_files->files_path.$file->md5.$model_files->seprator.$file->file_name));

和这些都是我不断收到在浏览器的响应头。

and these are the response headers which i keep getting in browser.

Date: Thu, 02 Jun 2011 12:56:56 GMT Server: Apache mod_fcgid/2.3.6 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 X-Powered-By PHP/5.2.15 Cache-Control no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma no-cache Expires Thu, 15 Apr 2021 20:00:00 GMT Content-Length 321823 Keep-Alive timeout=5, max=100 Connection Keep-Alive Content-Type image/png

我没有设定日期，缓存控制和附注，但保持让他们响应。

I am not setting Date, Cache-Control and Pragma but keep getting them in response.

我知道我可以覆盖他们，但老实说，我不知道究竟哪些值来设置。

I know i can overwrite them but honestly i don't exactly know which values to set.

推荐答案

有一个看的 session_cache_limiter 。

Have a look at session_cache_limiter.