Posted by Oli Filth on 11/29/05 14:43

Chung Leong wrote:
> FluffyCat wrote:
> > New on November 28, 2005 for www.FluffyCat.com PHP 5 Design Pattern
> > Examples - the Visitor Pattern.
> >
> > In the Visitor pattern, one class calls a function in another class
> > and passes an instance of itself. The called class has special
> > functions for each class that can call it.
> >
> > With the visitor pattern, the calling class can have new operations
> > added without being changed itself.
> >
> > http://www.fluffycat.com/SDCMSv2/PHP-Design-Patterns-Visitor/
>
> A class that passes an instance of itself to another class means you
> don't freaking know what you're doing. What's next? The spaghetti
> design pattern?

I think the OP has phrased this badly. He actually has an object
passing this ($this) to a method in another object, which is hardly
uncommon practice in most OO languages (e.g. registering a callback
interface with a child object).

However, the OP's example is not particularly great, as it's all being
driven from outside the objects in question.

--
Oli

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