Links between OOP objects

voidstate

I am trying to write my current project in OOP PHP, but have come across a problem.

I have three classes: GeneralFunctions, DbAccess and Products.

Products extends DbAccess because it needs to access the database. It also needs some of the functions from GeneralFunctions though. I can't seem to use extend to link it to both GeneralFunctions and DbAccess.

I thought of having DbAccess extend GeneralFunctions, so the three are in a chain, but there are going to bo other classes down the line which will just need DbAccess, so loading in GeneralFunctions too will be redundant.

How else can I make the methods of GeneralFunctions available to Products?

Any advice or links are very much appreciated,

Jack_Slocum

When you need the methods of GeneralFunctions (btw, having a class like "GeneralFunctions" is not good OO practice) just call them directly via GeneralFunctions::yourFunction();. For example:


class GeneralFunctions
{
  function foo()
  {
    // do something
  }
}

// not "Products", this is a definition of a class object (not objects)
// if you have a class for multiple items, find a 
// name that is singular but shows that it contains
// multiple items. i.e. ProductModel or ProductCollection
// in short, never plural for an object or something is wrong
// with your design
class Product extends DBAccess   

{
  function bar()
  {
    GeneralFunctions::foo();
  }
}

G'luck

voidstate

Thankyou. That's exactly what I needed to know.

Ferg