i am trying to work on the following code in PHP with Class. This class contains the CRUD (create, read/fetch, update and delete) functions.
when m running it in wamp.... it gives the errors like:

in the insert case: Fatal error: Fatal error: Call to a member function exec() on a non-object in C:\wamp\www\new DAO\dao.php on line 37

in the fetch case: Fatal error: Call to a member function query() on a non-object in C:\wamp\www\new DAO\dao.php on line 53

in the update case: it is not working

in the delete case: Fatal error: Call to a member function query() on a non-object in C:\wamp\www\new DAO\dao.php on line 53

plz help me to solve these problems...... if not all but atleast one

I fail to see how this has anything to do with the SilverStripe framework? This is not really the right place for general PHP questions... But maybe I'm missing something? :)

but now how will you help me???

There is nothing here that relates to silverstripe, this forum is for discussing silverstipe.

If you want regular php help please try www.php.net or maybe something like www.php-forum.com or comp.lang.php

Thank you so much