Passing database object to a function

[Pests]

Is it possible to pass a database object(or any object for that matter) as an argument to a function inside of a class? So, for example, will this work, and if not, how can I do something like this:

class Test
{
	var $db;

function Test($db)
{
	$this->db = $db;
}

function Query($sql)
{
	$result = $this->db->Execute($sql);
	// ...
}
}

$db = new DB();
$test = new Test($db);
$test->Query("SELECT * FROM user");

[ahundiak]

Yep. But you usually want to pass objects by reference.

function Test(&$db)
{
$this->db =& $db;
}

Otherwise, you end up making copies of the $db object which can cause problems.

[Pests]

Yea, I was expecting someone to tell me that. I know about passing by reference and what not, but not too sure how to use it. Thanks though.