trouble with headers and authentication

[DigitalDesign]

Hello all--

I seem to be having mysterious problems with the file shown below. I removed all the files from the directory, then uploaded them again (without changing anything) and suddenly I'm not able to log on correctly (files are for a cms)...I'm getting this message:

Warning: Cannot add header information - headers already sent by (output started at /usr/local/httpd/htdocs/kunden/web1/html/gymworld/cms/variables.php:391) in /usr/local/httpd/htdocs/kunden/web1/html/gymworld/cms/authorize.php on line 51

the strange thing is that there are NO headers in variables.php

<?php

require("connect.php");

if (!$user OR !$pass) {

header("location: [url]http://[/url]".$server."/".$path."index.php");

exit; }

@$outcome=mysql_query("SELECT * FROM users WHERE user='$user'");

require("failure.php");

$verify=0;

$access=mysql_fetch_array($outcome);

$userID=$access['ID'];

if ($user==$access["user"] AND md5($pass)==$access["password"])

{

@$outcome=mysql_query("SELECT * FROM login WHERE userID='$userID'");

require("failure.php");

$access2=mysql_fetch_array($outcome);

if ($access2["userID"]==$userID)

	{

	@$outcome=mysql_query("DELETE FROM login WHERE userID='$userID'");

	require("failure.php");

	}

$username=$access["user"]; $loginID=md5(uniqid($username));

$currenttime=time();

@$outcome=mysql_query("INSERT INTO login VALUES (NULL,'$userID','$loginID','$currenttime')");

require("failure.php");

$currenttime=time()+$timeout;

header("location: [url]http://[/url]".$server."/".$path."admin.php?username=$username&session=$loginID");

$verify=1;

}

if ($verify==0)

{

echo $textwarning[1];

}

?>

Any ideas, anyone?

[Dax]

heres an example code of a real php thing:

<?
if ((!$username) || (!$password)) {
         header("Location:[url]http://yourdumbdomain.com/yoursillyscript.php[/url]")
         exit;
}
?>

i dont think that you can use OR, its suppose to be ||
|| = OR
&& = AND

and you dont use <a href='blablabla'></a> inside Location:

[DigitalDesign]

I know you don't use <a href> inside Location, and it doesn't matter if OR or || are used.

[Dax]

yes lol, i messed up my mistake,

my hypothesis:
i dont think u should use it this way

@outcome = mysql_query("INSERT.......");

u should make it like this

$connection = @mysql_connect($host, $username, $password)


$sql = "INSERT bla bla bla...";
result = mysql_query($sql, $connection);
/*u have to make mysql query to sql and connection, or else u get errors
*\

oh btw, u know when u make a db.php, or connect.php in this case, it didn't work forme, whenever i type
include 'db.php';
it doesn't connect it messes up, so try putting all that information inside the script...