Hi Blueman. As soon as ANYTHING has been drawn to the browser, you
cannot use a header command. So you need to work through all of your
code, and ensure that all of your logic that could result in a header
call is run BEFORE you send any html code. Is going to be tricky if
mixing html and php calls.
George
On 10-Sep-09, at 12:27 AM, A.a.k wrote:
hello
I recentrly uploaded my project from localhost to a hosting and
found many errors and warnings which didnt have in local. one of the
most annoying one is header('Location xxx').
I have used header to redirect users from pages, and kinda used it
alot. i know about the whitespace causing warning, but most of the
pages i'm sending users got html and php mixed so i'm confused about
how to remove whitespace in a html/php file. the error is :
Warning: Cannot modify header information - headers already sent
by ....
here is a simple example, user update page :
if($valid)
{
$msg='111';
$user->dbupdate();
header("Location: /admin/index.php?msg=$msg");
}
else
{
foreach($errors as $val)
echo '<p id="error">'.$val.'</p>';
}
and on admin index i get $msg and display it.
<html>
......
//lots of stuff
<?php
$msg = $_GET['msg'];
switch($msg){
case '111' echo '<p> </p>';
break;
case '421':...
}
?>
// more html and php
how can i fix this?
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