PHP define() doesn't seem to be working with include()

This should work fine, and I've never seen it not work.

• Make 100% sure the includes are in the correct order (the defines need to be loaded first)

• Make test outputs of the constant values in the "definitions.php" file and the index file

• Make 100% sure you are calling the right files

Please check if your server supports short_open_tag this value would be commented. I just enabled it with on and it started working.