small problem, please help guys

[hubfub]

hey guys i have a small question and problem

what is the the difference between include, require and include_once

also

if i have a script running on the root directory /

and another running on a sub directroy i would use <?php require "./index.php"; ?> to read the index.php from the root directory

but say i had another subdirectroy insde that directory, waht would i use to still read the index.php off the root directory

and also say i had another directory inside that one and etc, is there a way to make it always read from the root?

thnaks for ur time guys

[jara06]

From manual:
"include() produces a Warning while require() results in a Fatal Error."
Therefore, an include file is not needed, and the script will continue, where it will die with a fatal error with require.

*_once looks if file have been included already before including.

include($file);
If file contains a parse error (or other fatal), the script will die there instead of continuing.

[leatherback]

This question shouild have been answered if you just had taken the time to RTFM:

include require require_once

An you can

include(../../../../../../in_some_subdirs.php);

[hubfub]

thanks heaps for the help guys