Maybe I'm misunderstanding something here, but PHP5 will let you chain calls:
class Foo
{
function Foo()
{
$this->bar = new Bar();
}
function & getBar()
{
return $this->bar;
}
}
class Bar
{
function baz()
{
print 'baz';
}
}
$foo = new Foo();
$foo->getBar()->baz();