Refresh Question

[182x]

Hey guys, I have created a page which had the PHP as listed below and the page works fine however if the user clicks refresh the pages goes all white and blank. I was just wondering why it does this? Thanks

[code]

<?php
session_start();
include ('db.php');
$link_id = db_connect('');

$g = "SELECT ff, nn e FROM cu WHERE Id = '". $HTTP_SESSION_VARS ["Id"]."'";

$rs = mysql_query($g, $link_id);


if (mysql_num_rows($rs) > 0 )

{
$r = mysql_fetch_assoc($rs);
$HTTP_SESSION_VARS ["Id"] = $r["Id"];

}


else
{

echo $HTTP_SESSION_VARS ["Id"];
exit();
}

?>

[/code]

[btherl]

This script modifies $HTTP_SESSION_VARS['Id'] .. so I would assume that the modification causes it to fail the second time around.

Checking your query for errors may help:

[code=php:0]$rs = mysql_query($g, $link_id) or die("Error in $g: " . mysql_error());[/code]

[182x]

That was the problem, thank you very much for your help!  :)