need to pass object as parameter

[Anon]

1 function foo (&$o){
2 $o->function(....);
3 }

$o= new Object;
foo($o);

this code throws this:
Fatal error: Call to a member function on a non-object on line 3

Does anibody knows how to pass an object as parameter

thanks!

[vsego]

PHP 4.0.6 and this works:

class Obj{
function a() {
echo "In a";
}
}

function foo (&$o){
$o->a();
}

$o = new Obj;
foo($o);