The trick to saving the SlickGrid is to realise that the grid will update the array of data that you supplied when creating the grid as the cells are edited.

The way I then save that is to include a form with a submit button and a hidden field below the grid. I trap the submit event and use the JSON plugin to serialise the array and place it in the hidden field. On the server side you'll receive a JSON string which you can deserialise, loop through and write to the database.

Assuming your array of data is called data like the samples, the following should work for you:

<form action=? method=POST>

  <input type=submit value=Save>

  <input type=hidden name=data value=>

</form>

<script>

  $(function() {

    $(form).submit(

      function() {

        $(input[name='data']).val($.JSON.encode(data));

      }

    );

  });

</script>