object orientated code

_0_05_

i understand how to do it, but i dont see why you would want to use it. I cant see any advantage of using it over functions. I would just like to know what everyone here uses them for. (specific examples, and code would be much apreciated)

sarahk

This whole argument has been done to death and is not really related to php but to programming as a whole.

php supports the whole inheritance thing if you code it right. As a scripting language it's pretty cool because you can be as quick and dirty or as precise and complete as you need.

I'd go to sites like devx and check out their articles.

twilson

5 cent,

The most common example I see for this is when you have say a program with 3 similar objects. Let's say they are bicycles. Hence:

Class Bicycle {
  function Move() {
    Move at $this->speed;
  }

  function Stop() {
    $this->speed = 0;
  }

  function Wheelie() {
    blah blah;
  }
}

redBike = New Bicycle;
greenBike = New Bicycle;
blueBike = New Bicycle;

redBike.color = #FF0000;
greenBike.color = #00FF00;
blueBike.color = #0000FF;

redBike.speed = 42;
greenBike.speed = 52;
blueBike.speed = 89;

redBike.Move();
greenBike.Move();
blueBike.Move();
blueBike.Wheelie();
redBike.Stop();
greenBike.Wheelie();

The syntax isn't exact because I haven't ever had a need to use classes but I think you get the idea. When each object has it's own variables (color, speed) they can be used in the functions as $this->color or $this->speed, basically eliminating the need to pass variables.

Peace,
Tom

royviggo

The biggest advantage IMO is that the data and methods (functions) are encapsulated, so you have a black-box interface to it. It turns into a generic building block that is a big time saver when you start new projects. Inheritance is also great.

As an example you can define generic classes for CGI-parameters, sessions and users, and extend them in a application class that all your scripts uses.

Roy