Description:
------------
There is some unusual behaviour in the attached function.  When a new Database object is created, and a query called by:

$result = $this->db_connection->query($valid_sql_query);

Different results will occur, depending on the layout of the Database::query method.

PHP version: 5.2.2
I do not own the webserver, and I doubt that they will be willing to upgrade to an unstable version to test it.

Reproduce code:
---------------
Works:
class Database{
    function query($_sql)
    {
        $q = mysql_query($_sql)or die("Invalid Query: $_sql <br />" . mysql_error());
		return $q;
    }
}

---

Returns true:
class Database{
    function query($_sql)
    {
        return mysql_query($_sql) or die("Invalid Query: $_sql <br />" . mysql_error());
    }
}

---

Works:
class Database{
    function query($_sql)
    {
        return mysql_query($_sql);
    }
}

Expected result:
----------------
In all cases, a mysql resource should be returned.

Actual result:
--------------
In cases 1 and 3 a mysql result is returned.  In case 2, the function simply returns true.