Tyler Carter Tyler Carter - 1 year ago 115
PHP Question

How to find out if you're using HTTPS without $_SERVER['HTTPS']

I've seen many tutorials online that says you need to check

if the server is connection is secured with HTTPS. My problem is that on some of the servers I use,
is an undefined variable that results in an error. Is there another variable I can check that should always be defined?

Just to be clear, I am currently using this code to resolve if it is an HTTPS connection:

if(isset($_SERVER['HTTPS'])) {
if ($_SERVER['HTTPS'] == "on") {
$secure_connection = true;

Answer Source

Chacha, per the PHP documentation: "Set to a non-empty value if the script was queried through the HTTPS protocol." So your if statement there will return false in many cases where HTTPS is indeed on. You'll want to verify that $_SERVER['HTTPS'] exists and is non-empty. In cases where HTTPS is not set correctly for a given server, you can try checking if $_SERVER['SERVER_PORT'] == 443.

But note that some servers will also set $_SERVER['HTTPS'] to a non-empty value, so be sure to check this variable also.

Reference: Documentation for $_SERVER and $HTTP_SERVER_VARS [deprecated]

Recommended from our users: Dynamic Network Monitoring from WhatsUp Gold from IPSwitch. Free Download