On May 7, 2010, at 8:41 PM, Karl DeSaulniers <k...@designdrumm.com> wrote:

On May 7, 2010, at 2:06 PM, Charlene Wroblewski wrote:

I have a problem with IE7. It has a tendency to cache output produced by PHP. It occurs in a few ways:

  * I make a minor change to a php program, but you can't see it in
    IE7, but can in FF.  CTRL-Refresh does not make it work.
  * I modify data using a form in IE7.  When I click on a link to
    return to the form the old data is still there, but if I hit
    CTRL-Refresh the new values are there.

I have set up some caching to try to fix the second issue, but I'm not sure if I've chosen the right header lines:

 $now = time ();
 $prety_lmtime = gmdate ('D, d M Y H:i:s', $now). ' GMT';
 $prety_emtime = gmdate ('D, d M Y H:i:s', $now + $interval). ' GMT';
  // Backwards Compatibility
  header ("Last Modified: $prety_lmtime");
  header ("Expires: $prety_emtime");
  // HTTP/1.1 Support
  header ("Cache-Control: private, max-age=$interval,s-maxage=0");

I got this code from a book. I don't want to prevent caching completely because I want to be able to go back to the form when there is an error in validation of fields before entering it into the db. But I do want to be able to see the new data after it is entered in the db.


Sounds like you need attach the data somehow when hitting that return link. Maybe an array
$newData = array();//fill this array with the new values

On your form page, set up a

//fill form fields

I did notice that on your header, you did not have "no-cache".

header ("Cache-Control: private, no-cache, max-age=$interval,s- maxage=0");


Karl DeSaulniers
Design Drumm

One other option is to fool the browser by appending a time variable to the end of the URL to get around caching.


Sent from my iPod

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