$_SERVER['DOCUMENT_ROOT doesn't work

[yang]

Hi,
im using phpmailer to send email, what is confusing me is that: (this actually is not a problem about phpmailer, but is what did i face when i tried to call phpmailer class in my php file)


firstly, i tried to include the phpmailer class file by:
require_once($_SERVER['DOCUMENT_ROOT'].'/config.php');
require_once($_SERVER['DOCUMENT_ROOT'].'/lib/MailClass.inc');
it didn't work. it said "files can't find".

then i tried: require("config.php");
require "lib/MailClass.inc"; it works

could someone explain this for me?

really confusing now

regards

[seandisanti]

try echoing those values instead of requiring them