Question

I have been learning php for sometime now. Besides reading books and doing tutorials i also like to sometimes read other programmers’ code. I have come across this:

<?php

    // authentication. 
    include_once($sys_root."/inc/authenticate_check.php");

I understand the use for $sys_root, but what i don’t understand is, how $sys_root is being assigned a value.

I have checked and made sure that $sys_root is not a special var of PHP.

Answer 1

Most likely another file, that defines $sys_root, will include or require this file.