Using no broswer cache

[Shadowing]

Ive been using no cache at the very top of my page

and then using a header with a number in the link

 <?php header("Location: settings.php?change=3"); ?> 

so the form updates after submit

 

Then I have a if statment to echo that form was submited

Any better ideas on how I can do this? 

Shouldnt I beable to just use no cache and use a standard echo in the form with no header in the form

the problem with the way im doing it now if user keeps refreshing the screen it keeps saying the echo. which makes sense

maybe its cause im not using the action in my form correctly with putting a link there?

small example below

 <?php
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Cache-Control: no-cache");
header("Pragma: no-cache");

if(isset($_GET['change'])) {

               echo "form submited";}

if(isset($_POST['build_naq'])) {
		if(!empty($_POST['stargate_naq'])) {
                       mysql_query("UPDATE settings SET naq=  '".mysql_real_escape_string($_POST['naq'])."'");
	}
	header("Location: settings.php?change=3");
}
?> 

[Shadowing]

Only other way i can think of on how to echo something on the page and show the updated information from the form is to use sessions

[Shadowing]

ive decided im going to just go back through several pages and use sessions instead for this situation. Cause it would allow me to carry information to the next page too.