Drupal 7 Module Development

Building an Admin Interface
This text contains three tokens:
• [site:name]: the site's name as described earlier
• [site:mail]: the administrative e-mail address (this is the same e-mail
address returned by variable_get('site-mail')
• [user:name]: the login name of a specified user
In order to make this work, we have to implement token_replace() in our
hook_mail() implementation as highlighted below:
/**
* Implement hook_mail().
*/
function user_warn_mail($key, &$message, $params) {
switch ($key) {
case 'warn':
$account = $params['account'];
$subject = variable_get('user_warn_e-mail_
subject','Administrative Warning');
$body = variable_get('user_warn_e-mail_text',
USER_WARN_MAIL_TEXT);
if (variable_get('user_warn_bcc', FALSE)) {
$admin_mail = variable_get('site_mail', NULL);
$message['headers']['bcc'] = $admin_mail;
}
}
$message['to'] = $account->mail;
$message['subject'] = $subject;
$message['body'][] = token_replace($body,
array('user' => $account));
break;
}
As you can see, we're now setting the e-mail body to the return value from
token_replace(). This function is pretty simple, it only takes two arguments:
• The text with tokens in place.
• An array of keyed objects to be used in the token replacement process. In this
case, the user object for the recipient of this e-mail as passed in the $params
argument from drupal_mail(). If you need other replacements (like for a
node) you would add additional objects into this array.
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