HELP: system variables inside classes

[uproa]

How can I view/get system variables like $DOCUMENT_ROOT from inside a class?

here my Example:

<?php
// ---------------------
// OK
echo "OUTSIDE the CLASS: [" . $DOCUMENT_ROOT . "]<BR>";
// ---------------------

class test {
function test () {
// ---------------------
// KO
echo "INSIDE the CLASS: [" . $DOCUMENT_ROOT . "]<BR>";
// ---------------------

}
}

$t1 = new test();
?>

result:

OUTSIDE the CLASS: [/home/www/htdocs/]
INSIDE the CLASS: []

Thanks in advance

[PHPThorsten]

Submit them to the Class

<?php 
// --------------------- 
// OK 
echo "OUTSIDE the CLASS: [" . $DOCUMENT_ROOT . "]<BR>"; 
// --------------------- 


class test { 
var $str_doc_root = "";
function test ($str_doc_root) { 
 $this->str_doc_root = $str_doc_root
// --------------------- 
// KO 
echo "INSIDE the CLASS: [" . $this->str_doc_root . "]<BR>"; 
// --------------------- 

} 
} 

$t1 = new test($DOCUMENT_ROOT); 
?> 

or define them as global.