<?
ini_set("register_globals", 1);
class foo {
	var $bar = "ok";

	function method() { $this->yes = "done"; }
}
$baz = new foo;
$baz->method();
$arr[3] = new foo;
$arr[3]->method();
session_register("baz");
session_register("arr");
print session_encode()."\n";
session_destroy();
?>

Result:
baz|N;arr|N;