Simple OOP System Examples

[Dave Tarmac]

I'm looking for any guides/tutorials on building a simple system/application using OO methods.

 

I'm new to OOP and after reading lots of 'What is OOP?' examples, I get the jist of what a class, method and property is and I get how to call them, creating an instance and manipulating that.

 

What I don't get is how sever classes can work together to form a functioning system. I've done a fair amount of Googling on the subject, but I can't seem to find a tutorial on building a simple system (for example a simple inventory system to manage DVD's or something) to show how they work in a real world situation (including database creation).

 

If anyone knows any websites that do such a thing, or can offer advice, or even point me in the direction of a book that might do such a thing then could you please share this information as I am actually tearing my hair out.

 

Many thanks.

[aschk]

You want an inventory system in PHP...

 

Have you defined what functionality this system is going to perform? Write that out for us and we'll get you rolling.

e.g.

1) Users can find a DVD based by category or title.

2) Admins can insert new DVDs into the database

3) A DVD has a title, product_id number, and a small description.

etc. etc.

[Dave Tarmac]

I did actually only choose the inventory example because I thought that it would be a good example usage of OOP methods.

 

But if you want, we can sort it out for an example.

 

Basically, a user (registered) can view any DVD's in the catalogue.

Only Admin can add new titles in to the DB

 

DVD ((id), title, description);

 

The reason I ask about a real world example is that I need to build a pack & pick warehouse system and I haven't really any clue where to start using OOP methodology.

 

If anyone has any ideas about this, then feel free to chime in.

 

Cheers.

[aschk]

Probably a good place to start would be with identifying your processes.

 

an example one:

1) User picks product -> product is added to basket -> product is taken from inventory -> inventory stock is reduced by 1

2) User selects checkout -> is presented with goods and total price (+ extras)

3) User completes information -> systems stores information

4) User completes credit card details -> system authenticates card information

5) System authorises completed transaction -> makes inventory reduction permanent

6) System sends product orders + details to product acquisition (i.e. people that get the product)

7) People print out customer details

People package product into box and shove in the van... (processes beyond this are human...)