Alter values using hook_civicrm_postProcess()

[awasson]

I think this is possible but I thought I'd check first.

I'd like to alter some values in the _params array for a particular contribution form using hook_civicrm_postProcess().

So far I've got a conditional that detects when the form is a contribution confirmation form and that pay_later == true. Then I use $params = $form->getVar('_params'); to expose the data I need. Once I process the data, I'd like to update the $form->_params.

Is there a best practice for doing that?

Thanks,
Andrew

[awasson]

Ok, I've done a little tinkering and it seems to me that the best way to do this is as follows (in case someone else has this question):

You can alter values in the $form object using hook_civicrm_postProcess() but since it is a postProcess() function, it doesn't really do a heck of a lot.