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Editorial Team
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Asked: 2026-05-12T21:32:47+00:00

I realize that you can’t 100% know that this will work in all browsers.

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I realize that you can’t 100% know that this will work in all browsers. All I care about is IE 8, Chrome, and Firefox. I need some base headers that I can put at the top of my PHP pages to allow the Forward/Back buttons to load the cache.

Update: on every page I have a logged in user box at the top of the page which gives the user access to their account.

I’m looking for a performance increase in the web site. The user having to reload the site when clicking back/forward creates unnecessary the server load.

Edit: After extensive research into caching and my level of knowledge I do not know a good solution. It also appears that most others don’t know either.

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  1. Editorial Team

    What you want is jumping back in the page cache. There are various variables that determine if a page is put into the page cache.

    Surfin’ Safari has recently written a blog about the page cache. In short a page isn’t put into it if:

    • The page is not completely loaded or uninteresting. (404 errors…)
    • The page is complicated to halt. This is the case if it has Flash elements or movies.
    • The page has frames.
    • The page is secure.
    • The page has an unload event. In their second blog post they write about alternatives.

    Those are the rules Webkit follows, I don’t know if it’s documented for the other browsers. You can never be sure that a page is put into the page cache. It’s best to design websites that don’t relay on behavior that can change without notice.

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