database value count retrieval

SELECT COUNT(x) FROM table; Make 'x' equal to any column name in the table and add WHERE to the clause as needed.

        err...all very well, but how do i retrieve the value afterwards? Heres my code:

        $sqlcom="select count(codigo) from comments where codigo=$id";
        $resultadocom = mysql_db_query ("database",$sqlcom);
        $registocom = mysql_fetch_array($resultadocom);
        $contador = $registocom["codigo"];
        print("comentarios= $contador");

        Nothing comes out, although i dont have a clue on how to retrieve the result after the fetch_array. :-P

        /Pag