Description:
------------
I've been using $_SERVER['SSL_PROTOCOL_VERSION'] since php3 and after updating from 4.3.6 to 4.3.10 that particular variable is no longer available.

We've been using it to check to see if the user is currently on our https: site, and if not, redirect them to it.

I've overcome the issue, but it took some head-scratching. Below is the source, both what I had, and what I needed to do to fix it:

Reproduce code:
---------------
if(!isset($_SERVER['SSL_PROTOCOL_VERSION'])) {
 Header("Location: https://www.url.com");
}

// Code that replaced it

if($_SERVER['SERVER_PORT'] != 443) {
 Header("Location: https://www.url.com");
}


Expected result:
----------------
Was expecting the SSL_PROTOCOL_VERSION to be set once they were on the https site, but it didn't, which put me in an endless loop attempting to redirect to the https site.


Actual result:
--------------
Again, put me in an endless loop because $_SERVER['SSL_PROTOCOL_VERSION'] was never set.