Prior code buggy, ineffective.

[devayes]

Echoing output before headers, this (from original source) is more simple and works. If the cookie does not exist, respond with 304 Not Modified (ie: cached, evercookie.js: line #446 )

[samyk]

Hi @devayes, it looks like this was changed primarily in this commit:
commit e3bc6c6
Author: Tom McKenzie tom@chillidonut.com
Date: Mon Jun 18 13:36:42 2012 +1000

Return blank 500 error when apache_request_headers doesn't exist
(prevents evercookie from being set to the PHP error message)

I'd investigate/document why it changed dramatically further before we change all the code in this one