[development] converting a module from Drupal 5 to Drupal 6

[Sheryl (Permutations Software)]

Steve Jones wrote:

> This is clearly in either a form _submit or _validate handler, so you'll
want to read, and understand:

> http://drupal.org/node/144132#buttons

I already read it - multiple times - and it didn't help. I wouldn't have
written to this list for help if I hadn't first tried to figure it out on my
own and read all the relevant docs.

	- Sheryl


-----Original Message-----
From: development-bounces at drupal.org [mailto:development-bounces at drupal.org]
On Behalf Of Sheryl (Permutations Software)
Sent: Wednesday, January 21, 2009 1:26 AM
To: development at drupal.org
Subject: [development] converting a module from Drupal 5 to Drupal 6

I'm converting a module from Drupal 5 to Drupal 6, and I'm having a very
hard time understanding the change in the use of 'op'. I can't figure out
how I need to change my code. There are these lines.

  if (!empty($form_values['op'])) {
    _phpfreechat_clear_cache();
    _phpfreechat_clear_cookies();
  }
  if (!_phpfreechat_check_install()) {
    form_set_error('op', _phpfreechat_not_found());
  }
  if (!_phpfreechat_check_files()) {
    form_set_error('op', t('Unable to create data folders for
phpfreechat.'));
  }

I took this module over from someone else, so I don't fully understand the
use of 'op' here to begin with. Not understanding what it's doing makes it
very hard to rewrite. I've spent the last two hours on the Drupal site
trying to figure it out and I'm boggled. All I can tell is that 'op' was the
default name of buttons in Drupal 5, but I still can't figure out what's
being tested in these "if" statements or how I need to rewrite them for
Drupal 6. Any guidance you can give me would be greatly appreciated!

- Sheryl