Question

Attached image shows the location of files it will help you to give answer. I want to include 'db/functions.php' in my file 'process/delete.php' but nothing is working.
I have tried following at start of 'delete.php'

include_once '/db/functions.php';
include_once './db/functions.php';
include_once '../db/functions.php';
include_once $_SERVER['DOCUMENT_ROOT'].'/db/functions.php';

When I open MAMP/log/php_error.log file it shows following error

[28-Jul-2012 21:55:23] PHP Warning:  include_once() 
[<a href='function.include'>function.include</a>]: 
Failed opening '/db/functions.php' for inclusion 
(include_path='.:/Applications/MAMP/bin/php/php5.3.6/lib/php') in 
/Applications/MAMP/htdocs/electromart/process/delete.php on line 3

Where line 3 is include statement.

Answer 1

From the error you could see the electromart folder is missing in the path and when you move to another machine the directory structure might change too depending on how the server is setup. Try

include_once $_SERVER['DOCUMENT_ROOT'].'/electromart/db/functions.php';