On 6/29/06, Sjef <manuals-scripts@xxxxxxxxx> wrote:
Hi there,
Hi Sjef, First off, I think David has a good point with regards to the OO vs Procedural approach. If you're looking to do this quick and easy, it might not be worth your time fussing with OO. Unless you'd like to just for the exercise, which I wholly support, so go for it!
I want to create a class Question for dealing wiht the questions and a class answer for the answers. Each could contain an array with the their part of the content of the database table.
As far as how to design it OO-style, I'd first urge you *not* to have separate classes managing lists of questions and answers. Say for example you query your db for questions, build up your array inside your questions class, and then while doing the same for your answers class, you inadvertently introduce a looping bug that drops one of the answers from the array, or possibly changes the order that you create your array, or any other number of possible mistakes (human or otherwise). Point is, in the end you'd have two out-of-synch classes that really should've been built separately to begin with. A single question and it's answer(s) are tied together, so keep it that way in your class abstraction. That said, I'd suggest building a question-answer *pair* as a class, and then you'd have an array of these question-answer pairs representing your entire list (which could be encapsulated into a container class if you wished). You could, to be even more abstract, create base question and answer classes to represent the most basic type of question or answer, and then hold individual, **related** instances of these within your question-answer pair class. Do you see the difference? You could even take it a step further and build derivatives of your base answer class to represent different types (string, multiple choice with one answer, multiple choice with many answers, etc)...But I'm sure I'm already getting far ahead of your original design. But David started it! :) HTH, John W -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
