[PHP] is_reference?

[GaM3R]

ok, the idea is this

        foreach ( $_user_details as $key=>$value ) {
                $return_array["$key"] = &$_user_details["$key"];
        }

im doing that and i want that when $return_array gets updated and isnt a reference 
anymore to be able to add it to the sql for an update, thats no problem IF i can work 
out a way to test if its a reference or a new string to update the database with

any suggestions?

i know i can foreach and == test them but an is_reference would be faster if it 
existed :/


Cameron