Drupal 7 Module Development

Chapter 5
That's it! The text returned from token_replace() will now look something
like this:
Hello eshqi,
We have been notified that you have posted comments on The Coolest
Site In The World that are in violation of our terms of service. If
this behavior continues your account will be suspended.
Sincerely,
The Coolest Site In The World
This e-mail is much better and personalized for both the sender and the recipient.
Summary
In reality the User Warn module is probably of limited utility, but it does help to
introduce many of the core concepts that Drupal developers will use on a day-to-day
basis. You are now able to create pages at a specific URL using hook_menu(), and
implement forms on those pages using the Form API. The values submitted from this
form can be saved using functions like system_settings_form(), confirm_form(),
or your own custom submit handler. You can also send the results of a form
submission as a custom email using dynamic tokens for text replacement.
In Chapter 7, Creating New Fields, we will begin examining Drupal 7's new Field API,
the core implementation of what was formerly the CCK module.
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