发布表单时使用输出缓冲区的PHP头重定向不起作用 - 但在其他情况下呢？

Question

I have an unusual problem, only happening on one server. Following code

....
elseif ($_GET['action']=='login') {

 if (empty($_POST['login_name'])) { $_POST['login_name']=''; }
 if (empty($_POST['login_pass'])) { $_POST['login_pass']=''; }
 if (!empty($_POST['send'])) {
  if (($_POST['login_name']==_ADMIN_NAME) and    ($_POST['login_pass']==_ADMIN_PASS)) {
   //Successfully logged in
   $_SESSION['logged']=1;

// DOES NOT WORK
   header('Location: '.$filename);
   die('Command '.$filename);
  }
 }
// Show Form;
include('plogin.inc.php');
} 
elseif ($_GET['action']=='logout') {
 $_SESSION['logged']=-1;
// DOES WORK!
 header('Location: '.$filename);
}

So the problem is this if i click the link logout, all goes well and i get redirected to $filename. If i submit the login form it checks if the post is correct, set's the session var, but then dies instead of redirecting.

I got output buffers on, all error reporting but (no errors), it doesn't redirect when I post with the form even though it definitely passes (because the session var is set and I get to the die part)

What could be the cause for this behavior? Thanks

Answer 1

might be a simple thing. The header() function does set a header, but does not terminate a script so that the header is sent immidiately after calling header().

You need to make php send the script result to the client. As you use output buffering, this result is held back until you trigger your output. Try this instead:

header('Location: '.$filename);
ob_end_flush();
exit();

Regards, Mario