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browser back button/caching and php

Can the browser back button or browser caching be turned on or off via php?

Thanks, Mike

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Aug 11 '05 #1
2 2447
Michael G wrote:
Can the browser back button or browser caching be turned on or off via php?


Well, you can send caching directives, through PHP if you
like, asking for the response to be kept out of caches, yes;
but that's not the same as turning browser caching off.

As to 'Back' buttons, or history lists, here's HTTP/1.1's
position (emphasis theirs):

| By default, an expiration time does not apply to history
| mechanisms. If the entity is still in storage, a history
| mechanism SHOULD display it even if the entity has expired,
| unless the user has specifically configured the agent to
| refresh expired history documents.

http://www.ietf.org/rfc/rfc2616

And as to what happens with 'Back' buttons in practice, YMMV.

--
Jock
Aug 11 '05 #2
In article <11************ *@spool6-east.superfeed. net>, Michael G wrote:
Can the browser back button or browser caching be turned on or off via php?


If you can get the PHP to run on the same machine as the browser it may be
possible to manipulate the config file :)
Manipulating the browser needs to be done using a language that the browser
can see like html or javascript.

Bye.
Jasen
Aug 16 '05 #3

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