Caching of html pages written by php

[Anon]

can any one tell me that how can i block
caching of pages in ie5
because anyuser is able to pounce back using his browser's back button

is there any solution to this in php3 or php4

[Anon]

Whenever I need to prevent caching I always tack on a varaible called $ig(idiot guard) to any link or form that goes to the page. I usualyy set the value to equal unix timestamp like

$ig = time();

Then at the top of the page I want to prevent hte caching on I check for $ig if it is not present I use meta tag refresh to reload the page with the $ig variable again tacked on to the end of the url so that the page will reload and the $ig variable will ensure that the freshest copy of the page is lao9ded from the server.