Can I use string concatenation to define a class CONST in PHP?

Question

I know that you can create global constants in terms of each other using string concatenation:

define(\'FOO\', \'foo\');
define(\'BAR\', FOO.\'bar\');  
echo         


        

Answer 1

This may not be directly what you're looking for, but I came across this thread, so here is a solution that I used for an issue I was having (based off of @user187291's answer):

define('app_path', __DIR__ . '/../../');
const APPLICATION_PATH = app_path;
.
.
.
require_once(APPLICATION_PATH . "some_directory/some_file.php");
.
.
.

Seems to work great!