Cloudflare flexible SSL - trick PHP scripts to identify HTTPS when cloudflare reports it was HTTPS request

cloudflare_https_prefix.php

<?php
/*
Instructions
Go to your php.ini for the web scripts (pointless for cli scripts)
Make the following adjustment
auto_prepend_file = full/path/to/clousflare_https_prefix.php

reload/restart php service (or apache if running via apache)

How this works
This script will automatically run before any other php script runs (on incoming requests)
This script will check if cloudflare has set the HTTPS protocol forwarding header (HTTP_X_FORWARDED_PROTO)
and will adjust the $_SERVER variables accordingly if so.
*/

if(!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https'){
        $_SERVER['REQUEST_SCHEME'] = str_replace('http', 'https', $_SERVER['REQUEST_SCHEME']);
        $_SERVER['SERVER_PROTOCOL'] = str_replace('HTTP', 'HTTPS', $_SERVER['SERVER_PROTOCOL']);
        $_SERVER['HTTPS'] = 'on';
}