Combine Cache-Control header in one line

Sorted by RFC 2616:

Section 14.9.1 `no-cache`
Section 14.9.2 `no-store`
Section 14.9.4 `must-revalidate`

Combined into one line with IE's `pre-check` and `post-check`.  However,
when both set to `0`, both are entirely ignored:

http://blogs.msdn.com/b/ieinternals/archive/2009/07/20/using-post_2d00_check-and-pre_2d00_check-cache-directives.aspx

1 files changed, 1 insertions, 2 deletions

diff --git a/usr/local/captiveportal/index.php b/usr/local/captiveportal/index.php
index 90f0dbb..0e65a26 100644
--- a/usr/local/captiveportal/index.php
+++ b/usr/local/captiveportal/index.php
@@ -40,8 +40,7 @@ require_once("captiveportal.inc");
 $errormsg = "Invalid credentials specified.";
 
 header("Expires: 0");
-header("Cache-Control: no-store, no-cache, must-revalidate");
-header("Cache-Control: post-check=0, pre-check=0", false);
+header("Cache-Control: no-cache, no-store, must-revalidate, pre-check=0, post-check=0");
 header("Pragma: no-cache");
 header("Connection: close");