Passing extra data to callback.

[eluser]Unknown[/eluser]
I found a post related to CI 1.63 that showed how to pass extra data to a call back using the following code.

Code:

$this->form_validation->set_rules('username', 'Username', 'callback_username_check['.$id.']');

and then you can setup your callback function to receive more than 1 argument

Code:

function username_check($str, $id) {}

However this doesn't seem to be in the documentation. Is this bad practice or deprecated?

I have seen other posts that suggest that you should use variables or post/get data within your callback in order to use data other than the form field passed however this does break encapsulation.

Thanks!