user_email_convert.php

<?php

$vars = "user_mail_status_canceled_subject
user_mail_register_admin_created_subject
user_mail_register_admin_created_body
user_mail_register_no_approval_required_subject
user_mail_register_no_approval_required_body
user_mail_register_pending_approval_subject
user_mail_register_pending_approval_body
user_mail_password_reset_subject
user_mail_password_reset_body
user_mail_status_activated_subject
user_mail_status_activated_body
user_mail_status_blocked_subject
user_mail_status_blocked_body
user_mail_status_canceled_body";

$vars = explode("\n", $vars);

$changes = array(
  '!username' => '[user:name]',
  '!mailto' => '[user:mail]',
  '!login_url' => '[user:one-time-login-url]',
  '!site' => '[site:name]',
  '!login_uri' => '[site:url]',
  '!edit_uri' => '[user:edit-url]',
  '!uri_brief' => '[site:url-brief]',
  '!password' => 'Your password',
  //'' => '[user:cancel-url]',
                 );

foreach ($vars as $var_name) {
  print($var_name."\n");
  $msg = variable_get($var_name);
  foreach ( $changes as $search => $replace) {
    $msg = mb_ereg_replace($search, $replace, $msg);
  }
  variable_set($var_name, $msg);
}

echo "\n";