Detecting SSL With PHP [duplicate]

Question

Possible Duplicate:
How To Find Out If You are Using HTTPS Without $_SERVER['HTTPS']

I went looking around the web for ways to detect if a server is using an HTTPS connection, but no one site seemed to have all the answers (and some different ones). What exactly are all the ways to detect if a server is using an HTTPS connection with PHP? I need to know several ways to detect SSL as some of my scripts are redistributed and various servers handle things differently.

Answer 1

$_SERVER['HTTPS']

Set to a non-empty value if the script was queried through the HTTPS protocol.
Note: Note that when using ISAPI with IIS, the value will be off if the request was not made through the HTTPS protocol.

http://www.php.net/manual/en/reserved.variables.server.php

Ergo, this'll do:

if (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') {     // SSL connection }