Use PHP to check if page was accessed with SSL

Question

Is there a way to check if the current page was opened with SSL? For example, I want my login page (login.php) to check if it was accessed using SSL (https://mywebserver.com

Answer 1

<?php
if ( !empty( $_SERVER['HTTPS'] ) ) {
  //do secure stuff
}else{
  //warn or redirect or whatever
}
?>

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

Answer 2

You should be able to check that $_SERVER['HTTPS'] is set, e.g.:

if (empty($_SERVER['HTTPS'])) {
    header('Location: https://mywebserver.com/login.php');
    exit;
}