Question

I am going to need my page to refresh an image when the user hits the browsers back button.
It is a captcha and for some reason upon ‘back’ the page is loading the old captcha, which code will no longer work.

I tried adding the <img src="captcha.jpg?"<?php echo time(); ?> />, but surely, the image was found in the cache. (we loaded it a few seconds ago :))

Thanks!

Answer 1

use php headers too it will help u alot

   header("Expires: Thu, 19 Nov 1981 08:52:00 GMT"); 
   header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");       
   header("Pragma: no-cache");

and html tags too

   <META HTTP-EQUIV="Expires" CONTENT="0">
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-store">