如何为我的PHP类选择正确的架构？

This is the first web app that i am building by myself.

Before coding i like to organize my ideas, do class and requiriments diagrams.

So i have to do this in my software

-Add users. -Add buy orders.

I am thinking my classes in two different ways.

Like this:

class User{
    function add()
    function edit()
}

class BuyOrder{
    function add()
    function edit()
}

Or

class Add{
   function user()
   function buyOrder()
}

class Edit{
    function user()
    function buyOrder()
}

As you can see they will do the same but with different writting.

Any ideas?

thanks

I think User and BuyOrder should be a class.

However, it doesn't make sense to me to have an add function be a part of these classes since the creation of a new instance of these classes effectively is the add.

Instead I would create AddUser and AddOrder functions which create the instances and properly add them where they need to be.

public class User 
{
   public Guid Id { get; set; }
   public string Name { get; set; }
   pubic string LastName { get; set; }
   public byte Age { get; set; }
   public List<Order> Orders { get; set; }
}

public class Order 
{
   public Guid Id { get; set; }
   public decimal Price { get; set; }
   public bool IsAvailable { get; set; }
}

public class Service 
{
   public User Create(User user) { };
   public User Read(Guid id) { };
   public void Update(User user) { };
   public void Delete(Guid id) { };

   public Order Create(Order order) { };
   public Order Read(Guid id) { };
   public void Update(Order order) { };
   public void Delete(Guid id) { };


   // Add orders to user basket
   public void AddOrdersToUserBasket(List<Order> orders, User user) { }; 
   public void AddOrdersToUserBasket(List<Order> orders, Guid id) { };

   // Get all orders of current user
   public List<Order> ReadOrdersForUser (Guid id) { };

   // Send orders and user data to process a delivery.
   public void Send ProcessOrdersAndUserData(List<Order> orders, User user) { };
}

Instead of void as return value, you can use the some wrapper:

public class Answer 
{
   public bool Result { get; set; }
   public string Message { get; set; }
}

And need to divide the service to UserSevice, OrderService and ProcessService.