Using a database class in my user class

Question

In my project I have a database class that I use to handle all the MySQL stuff. It connects to a database, runs queries, catches errors and closes the connection.

Now I

Answer 1

Here is a solution using PDO.

setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT );
                self::$dbh->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING );
                self::$dbh->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
            } catch( PDOException $e ){
                $error_message = $e->getMessage();
                exit();
            }
            return self::$dbh;
        }
    }

    class MYObject {
        public static $dbh = null;

        public function __construct(PDO $db = null) {
            if($db === null){
                $this->dbh = Database::connect();
            } else {
                $this->dbh = $db;
            }
        }
    }

    class User extends myObject {
        public function __construct($id = null, PDO $db = null) {
            if($db === null){
                parent::__construct();
            } else {
                parent::__construct($db);
            }

            if($id !== null){
                return $this->select($id);
            }
        }

        public function select($id) {
            $retVal =false;
            try {
                $stmt = $this->dbh->prepare("SELECT...");
                $stmt->execute();

                if( $stmt->rowCount()==1 ){
                    $row = $stmt->fetchAll(PDO::FETCH_ASSOC);
                    $retVal =json_encode($row);
                 }
            } catch (PDOException $e ) {
                $error_message = $e->getMessage();
                exit();
            }
            return $retVal;
        }
    }
?>