Drupal专业开发指南 第14章 使用hook_taxonomy()来获悉词汇表的变更

如果你为你自己的模块保留了一个词汇表，当使用标准的分类用户界面修改你的词汇表时，那么你将想收到词汇表的相关修改信息。对于由taxonomy.module维护的已有的一个词汇表，当它被修改时，你可能也想收到相关的修改信息。在任何一种情况下，通过实现hook_taxonomy()，当词汇表变更时你都会收到相应的通知。下面的模块实现了hook_taxonomy()，当词汇表变更时，你将会收到电子邮件通知。下面是taxonomymonitor.info文件：

 

; $Id$

name = Taxonomy Monitor

description = Sends email to notify of changes to taxonomy vocabularies.

package = Pro Drupal Development

dependencies[] = taxonomy

core = 6.x

 

    下面是taxonomymonitor.module：

 

<?php

// $Id$

 

/**

 * Implementation of hook_taxonomy().

 *

 * Sends email when changes to vocabularies or terms occur.

 */

function taxonomymonitor_taxonomy($op, $type, $array = array()) {

    $to = 'me@example.com';

    $name = check_plain($array['name']);

 

    // $type is either 'vocabulary' or 'term'.

    switch ($type) {

        case 'vocabulary':

            switch($op) {

                case 'insert':

                    $subject = t('Vocabulary @voc was added.', array('@voc' => $name));

                    break;

                case 'update':

                    $subject = t('Vocabulary @voc was changed.', array('@voc' => $name));

                    break;

                case 'delete':

                    $subject = t('Vocabulary @voc was deleted.', array('@voc' => $name));

                    break;

            }

            break;

        case 'term':

            switch($op) {

                case 'insert':

                    $subject = t('Term @term was added.', array('@term' => $name));

                    break;

                case 'update':

                    $subject = t('Term @term was changed.', array('@term' => $name));

                    break;

                case 'delete':

                    $subject = t('Term @term was deleted.', array('@term' => $name));

                    break;

            }

    }

 

    // Dump the vocabulary or term information out and send it along.

    $body = print_r($array, TRUE);

 

    // Send the email.

    watchdog('taxonomymonitor', 'Sending email for @type @op',

        array('@type' => $type, '@op' => $op));

    drupal_mail('taxonomymonitor-notify', $to, $subject, $body);

}

 

    对于一些额外的功能，比如将变更者的名字也包含进来,你可以修改这一模块来实现自己的需求。