Reverse Proxy Conditional

create reverse-proxy-conditional.php

<?php
/**
 * Conditional to check if we're being served via the Reverse Proxy.
 * The URL for the Forwarded Server below (example.com) should be the final
 * URL for the site using the Reverse Proxy.
 */
function lc_is_reverse_proxy() {

	if ( 'www.example.com' === $_SERVER['HTTP_X_FORWARDED_SERVER'] ) {
		return true;
	} else {
		return false;
	}

}