calling include from an included file

Question

So, examining this directory structure

• /include_one.php
• /include_two.php
• /directory/main_file.php

A

Answer 1

I am using this code:

if(!isset($TO_HOME_DIR)) $TO_HOME_DIR="../"; 

And I include a file:

include_once($TO_HOME_DIR."common/include_one.php");

With if(!isset($TO_HOME_DIR)), it's not important how much you include a file into included file into included file into includ..... Only first file's -and main file's- $TO_HOME_DIR declaration is used.

Second advantage of this approach is, if you change directory of file, you only need to change one line of code; $TO_HOME_DIR declaration. :)