5
I don't think you can embed an "include" within a "define" value, unless there's a tricky way of doing it with "eval".
You could either (1) add the text in main.php:
define("_USERPAGE_EMPTY_PAGE","
text
more text
and more text
");
or (2) put it in a separate file other.php:
define("_USERPAGE_EMPTY_PAGE","
text
more text
and more text
...
");
?>
and change main.php:
#define("_USERPAGE_EMPTY_PAGE","Disclaimer and rules");
include('other.php');