Hi,
I have problem in undertanding the require_once/require/include/include_once
functionality. Php files in my project are located in different folders.
Some folders have common files for other files. And file layout is like this

/*
    File: a.php
*/
require_once('../test/db.php');
...


/*
File: db.php
*/
require_once('../globals/global.php');
...


when i include a.php in another file i get error for global.php file that
path could not be found. And if i correct the path in db.php then someother
file which is using db.php will get error. So, can someone elaborate that
how relative path works in require_once. what is the starting directory for
require_once function which is using relative path.

Or

Is there any way that i can included some constant which include the
absolute path from which all relative paths can be determined?

Comments welcome.

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