include file in a class with global/parent scope?

Hello,

I understand the why $vars is not in the global scope, but i was
wondering if there was a way from within the class file to include a
file in the parent's scope?

i tried ::include('vars.php'), parent::include('vars.php'), but this
breaks syntax...

Please consider the following three files:

'scope.class.inc'
<?php
class CScope {
	
	public $var = 'class scope\n';
	
	function cinclude($filename) {
		include('vars.php');
		echo "In class $vars\n";
	}
}
?>

'vars.php'
<?php
//global $vars;//if this line is uncommented then the desired result is
achieved however, i don't want to change all the variables to global
scope (this file is includeded in other files where global scoped
variables is not desireable).
$vars = 'vars.php scope\n';
?>

'scope.php'
<?php
include('scope.class.inc');
$object = new CScope;
$object->cinclude('vars.php');
echo "In original $vars\n";//$vars is not defined***
?>

Thanks,
dK