strange header("Location: ....) behaviour

Devel

Im using header("Location: ...) in der middle of the page. I know it shouldnt work but it does.

<?session_start();?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Login</title>
<link rel="stylesheet" type="text/css" href="css/admin.css">
</head>
<body>
<?
if($_POST["login"]){
 if($user == "user" && $pwd == "pwd"){
  session_register('user');
  header("Location: content/maincontainer.php");
 }else{
  include("login/loginform.php");
 }
}else{
 include("login/loginform.php");
}
?>
</body>
</html>

And this is really working.
Any ideas, why?

Devel

mtmosier

You likely have output buffering turned on in your php.ini file.

Devel

Thanx for the answer mtmosier.
I've chacked the php.ini and there is:
output_buffering = 4096

So I've tested this and insertet befor header("Location: ...") a lot of text and then I've recived the common error.

But my question is if the buffer grows continual or is it by the next page empty again?

Devel

mtmosier

Output gets flushed at the end of every page, even if doing a redirect.

Devel

Wow! Thank you again.
This is so great to find a good forum.

Devel