$_POST keys are persisted...

davidklonski

Hello guys

I am using IE6.0 and I am running into a small problem.
I wrote a simple form in page.php:

<?php
   if (isset($_POST['txt'])) {
      echo 'txt is already set<br>';
   }
?>
<form name='x' method='post' action='page.php'>
  <input type='text' name='txt'>
  <input type='submit' value='go'>
</form>

Note that I am using post as the method
Also note that I am sending the information to the same page.

For some reason (and maybe this is the right behaviour), when I refresh this page, I always get the line: "txt is already set" printed.

Doesn't the browser clean up all the $POST keys when the page is reloaded? If not, how do I cause it to do it?
The same behaviour happens when I go from page.php to another page and clicks 'back' in the browser.
Is there a way to cause the browser to start the page with a clean $POST array?

Note the since the form sends the info to the same page there is a case where I need those keys in the $_POST array.

thanks in advance and sorry about the lack of browser-related knowledge.

YodaOfCamarilla

try naming your send form button...

<input type="submit" value="Submit Details" name="sent">

then instead of using...

   if (isset($_POST['txt'])) { 
      echo 'txt is already set<br>'; 
   }

use...

if($sent)
{
echo 'txt is already set<br>'; 
}

bubblenut

It will still return true I'm afraid. I think the reason no one has answered this yet is because it's very difficult to explain why this happens as it does without explaining how the http works all together. Basically every time your browser calls a page it sends an http request to the server a POST request is just a different kind of http request to a GET one, it is still re-sent to the webserver when you refresh the page. Therefore it doesn't matter if your browser used POST or GET when it requested from the server, the same request will still be sent to the server when the page is refreshed.
More information can be found about http here

HTH
Bubble