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{
private $db;
function myclass()
{
$this->db= & new MyDB();
}

function get_nav()
{
$nav_ary=$this->db->db_nav();
return $nav_ary;
}
}

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class MyDB
{
function MyDB()
{
}

public function db_nav()
{
/* some code here*/
        }
}

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