error when Header()!!!! H E L P!!

Anon

I am facing an error when do Header() which redirect to other page. However, it keep on saying "Warning: Cannot add header information - headers already sent by " . But i did check throughly of my code, i didn't do any 'echo' or display any string.. so wondering what is other possible causes for this error.

nashirak

ok... well make sure that you have no HTML tags at all before doing the redirect:...

Its basically telling you that somewhere in your code you started sent some headers. Wethere that be a cookie, html tag (like <header> or )... check back though your code and make sure that that is the first thing you do is
<?php
header("Location: somepage.html");
?>

Hope this helps

Anon

ok, may be u can a look of the code below, coz i include this file on top of the redirect page.
<pre>
<?
function is_nav4()
{
global $HTTP_USER_AGENT;

// Netscape - Mozilla/4.7 [en] (Win98; I)
// IE - Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)
if (eregi("^([a-z0-9]+)/([0-9.]+) (.*)$", $HTTP_USER_AGENT, $regs)) {
	if (strstr($regs[3], 'MSIE')) {
		return false;
	} else {
		if ($regs[2] < 5) return true;
	}
}
return false;

}

function showing_header_footer()
{
global $act;

$show_header_footer[] = 'addressupdate';
$show_header_footer[] = 'config';
$show_header_footer[] = 'contactdetails';
$show_header_footer[] = 'empty_confirmation';
$show_header_footer[] = 'filtering';
$show_header_footer[] = 'folder';
$show_header_footer[] = 'freadmessage';
$show_header_footer[] = 'popaccount';
$show_header_footer[] = 'popadd';
$show_header_footer[] = 'readmessage';
$show_header_footer[] = 'sendmail';
$show_header_footer[] = 'findmessage';
$show_header_footer[] = 'showaddressbook';
$show_header_footer[] = 'startup';
$show_header_footer[] = 'upload';

while(list($var,$file_n) = each($show_header_footer)) {
	if ($act == $file_n) {
		return true;
	}
}
return false;

}
?>
</pre>

nashirak

so you have the file setup something like

require("whateverfilethisis.php");

header("Location: gotnextpage.php");

if this is the case then those <pre> </pre> tags should be the first to go. Next, take out all spaces and comments out of that code above. Then make sure all white space above <?php and below ?> is gone. Also make sure there are no command charters or something. If you read the PHP manual on header() you will find that there can be no spaces between code and that your problem is very common one:

Quoted from manual:

               Remember that the header() function must be called before any actual output is sent, either by       HTML tags blank lines in a file, or from PHP. It is a very common error to read code with include(), or

require(), functions, or another file access function, and have spaces or empty lines that will output before
header() is called. The same problem exists when using a single PHP/HTML file.

end quote.
That should work.

Anon

Thanks a lot Nashirak.