PHP Warning: define() expects at least 2 parameters, 1 given in

Hi
i swtiched hosting companies
And now i'm finding these things in error_log that i think its causing alot of things to go bad on the website, including not forcing the users to login anymore ebfore seeing content, some bases dont load
here's the error

[23-Oct-2011 17:05:25] PHP Warning:  define() expects at least 2 parameters, 1 given in /home/ffffsu/includes/init.php on line 6
[23-Oct-2011 17:05:25] PHP Warning:  define() expects at least 2 parameters, 1 given in /home/ffffsu/includes/init.php on line 7
[23-Oct-2011 17:05:25] PHP Warning:  define() expects at least 2 parameters, 1 given in /home/ffffsu/includes/init.php on line 8
[23-Oct-2011 17:05:25] PHP Warning:  define() expects at least 2 parameters, 1 given in /home/ffffsu/includes/init.php on line 9
[23-Oct-2011 17:05:25] PHP Warning:  define() expects at least 2 parameters, 1 given in /home/ffffsu/includes/init.php on line 10
[23-Oct-2011 17:05:25] PHP Warning:  define() expects at least 2 parameters, 1 given in /home/ffffsu/includes/init.php on line 11

Code (markup):

here's init.php

<?php
/** define real path */
$path = str_replace('init.php','',realpath(__FILE__));
$root = str_replace('includes/','',$path);
/** DOMAIN needs changing */
define('DOMAIN')	        ? null : define('DOMAIN',           'XXXXX.su');
define('DS') 		        ? null : define('DS',               DIRECTORY_SEPARATOR);
define('ROOT')              ? null : define('ROOT',             $root);
define('WEB_ROOT')          ? null : define('WEB_ROOT',         $root.'public_html');
define('LIB_PATH')          ? null : define('LIB_PATH',         $path);
define('WEB_PATH')          ? null : define('WEB_PATH',         'http:'.DS.DS.DOMAIN.DS);

#special 

#main functions
require_once(LIB_PATH."functions.php");
#database functions functions
require_once(LIB_PATH."database.php");
#system functions
require_once(LIB_PATH."session.php");
#extra functions
require_once(LIB_PATH."user.php");
#custom functions
require_once(LIB_PATH."tbl.php");

?>

Code (markup):

anybody any help?

 

<?php
/** define real path */
$path = str_replace('init.php','',realpath(__FILE__));
$root = str_replace('includes/','',$path);
/** DOMAIN needs changing */
define('DOMAIN',           'XXXXX.su');
define('DS',               DIRECTORY_SEPARATOR);
define('ROOT',             $root);
define('WEB_ROOT',         $root.'public_html');
define('LIB_PATH',         $path);
define('WEB_PATH',         'http:'.DS.DS.DOMAIN.DS);

#special 

#main functions
require_once(LIB_PATH."functions.php");
#database functions functions
require_once(LIB_PATH."database.php");
#system functions
require_once(LIB_PATH."session.php");
#extra functions
require_once(LIB_PATH."user.php");
#custom functions
require_once(LIB_PATH."tbl.php");

?>

PHP:

The ternary operator method isn't really needed.....