Best practice for filing of abstract class and subclasses?

Question

I was wondering what is the best (and real-word) practice for doing an abstract class and subclasses in PHP when it comes to filing.

I have abstract class games, and I was wondering if I should put the subclasses into separate files and require_once('games.class.php'); for separate files or just have each subclass in the abstract class games file?

Thanks!

Answer 1

People generally tend to use one file per class -- mapping the files names to the classes names (this facilitates autoloading).

For a quite good example of this, you should take a look to the sources of Zend Framework : there are a great number of classes, with interfaces, abstract classes, multiple-levels of sub-directories and all.

And here is the relevant part of their Coding Standards.