class PDO_ extends PDO
{
        public function __construct ($dsn, $username, $password)
        {

                parent :: __construct ($dsn, $username, $password);

                //$this -> setAttribute (PDO :: ATTR_ERRMODE, PDO :: ERRMODE_EXCEPTION);
                $this -> setAttribute (PDO :: ATTR_DEFAULT_FETCH_MODE, PDO :: FETCH_ASSOC);
        
        }

        function prepare ($sql) {
                $stmt = parent :: prepare($sql, array(
                        PDO :: ATTR_STATEMENT_CLASS => array('PDOStatement_')
                ));
                return $stmt;
        }
function query($sql, $params = array()) {
$stmt = $this -> prepare($sql);
$stmt -> execute($params);
return $stmt;
}
function querySingle($sql, $params = array()) {
$stmt = $this -> query($sql, $params);
$stmt -> execute($params);
return $stmt -> fetchColumn(0);
}
function queryFetch($sql, $params = array()) {
$stmt = $this -> query($sql, $params);
$stmt -> execute($params);
return $stmt -> fetch();
}
}
class PDOStatement_ extends PDOStatement {
function execute($params = array()) {
if (func_num_args() == 1) {
$params = func_get_arg(0);
} else {
$params = func_get_args();
}
if (!is_array($params)) {
$params = array($params);
}
parent :: execute($params);
return $this;
}

function fetchSingle() {
return $this -> fetchColumn(0);
}

        function fetchAssoc() {
        $this -> setFetchMode(PDO :: FETCH_NUM);
        $data = array();
        while ($row = $this -> fetch()) {
        $data[$row[0]] = $row[1];
        }
        return $data;
        }   

}