No caching.

**Joh** · 2003-07-12, 15:20

How do I do so that my pages does not cache on the visitors phone? If it does, the visitor won't know when the page has changed. I use php to create my pages if that gives any help.

Also, I would like to know which phones can use the same applications. For example, if 3410 can use the same games, etc as 3510i.

Thanks in advance!

**SVii** · 2003-07-14, 06:49

Hi!

You can prevent the caching by adding the following headers to your php code:

<?php
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
// Date in the past
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
// always modified
header("Cache-Control: no-store, no-cache, must-revalidate");
// HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
// HTTP/1.0
?>

Kind regards,

sami / Forum Nokia Developer Support

**bazm** · 2006-07-31, 18:26

Hi!

This is a fairly (well ok very) old post but I hope my plea for help might bring it alive...

No matter how I try (and I've tried the world) I cannot get caching to stop on a Nokia 7610. I have a very simple page which references a text file that is always changing:

web page file "NextPage.php"
----------------------------

<?php
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate(\"D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
header("Content-type: text/vnd.wap.wml");
echo "<?xml version=\"1.0\"?>";
?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN\" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<head>
<meta http-equiv="Cache-Control" content="no-cache"/>
<meta forua="true" http-equiv="Cache-Control" content="max-age=0"/>
</head>
<card id="index" title="MyPage" newcontext="true" ontimer="NextPage.php"><timer value="25"/>
<?php echo file_exists ('page.txt') ? file_get_contents ('page.txt') : ' ' ?>
</card>
</wml>

I get the first page of text and I can see the page "refresh" (flash) on the phone but it will not refresh to the next page of text. I have checked that the text file is changing on the web server and everything works when I use an Opera browser on my PC!.

Please - has anybody got a hidden nugget of a suggestion?

Best Regards!

**jonesdk** · 2006-08-15, 16:36

One way to get around this is to append some sort of unique query string to the url on each request. I know this isn't the nicest approach, but it works, so there you go.

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