9

I just started to peek into the docs and source (Drupal 6 at the moment) and noticed that there are no classes to be seen, only vast number of prefixed functions. Is this handy? Does such decision have a background? Why?

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  • Why are you using Drupal 6? Drupal 8 is on the way!
    – iconoclast
    Nov 6, 2012 at 15:28

2 Answers 2

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This is pretty well explained on Drupal programming from an object-oriented perspective.

In short, Drupal has existed for much longer than you could properly use OOP in PHP. Which means, PHP5.

Drupal 7 already uses classes internally in a lot of places and it will probably continue so with Drupal 8.

But this is a step by step process and not everything needs to be a class. For example, it does not make any sense to make modules into a single class.

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  • Drupal 8 will be very OOP, pulling in many of the components of Symfony2. But the APIs for developers will still be the backward-compatible hooks, FTMP.
    – paul-m
    Jan 3, 2013 at 21:03
  • It will be a lot more OOP yet, and the point about the API's is not correct. That's just because things aren't completely converted yet. hook_block_*() just got replaced by the plugin system, for example, routing will change, configuration will change, the entity system has changed, ...
    – Berdir
    Jan 5, 2013 at 13:45
  • @Berdir I am very interested in how to leverage OOP PHP in Drupal 7 as I will probably not make the move to Drupal 8 right now. Are there some examples?
    – jerome
    Apr 12, 2014 at 15:02
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Drupal was created before oo became better in php5. Objects are being used more in drupal in each release but you need to balance a complete rewrite and adding new features.

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