下面是完整的函数，我们的新区块如图9-7所示：
function approval_block($op = 'list', $delta = 0, $edit = array()) {
switch ($op) {
case 'list':
$blocks[0]['info'] = t('Pending comments');
$blocks[0]['cache'] = BLOCK_NO_CACHE;
$blocks[1]['info'] = t('Unpublished nodes');
$blocks[1]['cache'] = BLOCK_NO_CACHE;
return $blocks;
case 'configure':
// Only in block 0 (the Pending comments block) can one
// set the number of comments to display.
$form = array();
if ($delta == 0) {
$form['approval_block_num_posts'] = array(
'#type' => 'textfield',
'#title' => t('Number of pending comments to display'),
'#default_value' => variable_get('approval_block_num_posts', 5),
);
}
return $form;
case 'save':
if ($delta == 0) {
variable_set('approval_block_num_posts', (int)
$edit['approval_block_num_posts']);
}
break;
case 'view':
if ($delta == 0 && user_access('administer comments')) {
// Retrieve the number of pending comments to display that
// we saved earlier in the 'save' op, defaulting to 5.
$num_posts = variable_get('approval_block_num_posts', 5);
// Query the database for unpublished comments.
$result = db_query_range('SELECT c.* FROM {comments} c WHERE c.status = %d ORDER BY c.timestamp', COMMENT_NOT_PUBLISHED, 0, $num_posts);
$destination = drupal_get_destination();
$items = array();
while ($comment = db_fetch_object($result)) {
$items[] = l($comment->subject, 'node/'. $comment->nid,
array('fragment' => 'comment-'. $comment->cid)) .' '.
l(t('[edit]'), 'comment/edit/'. $comment->cid,
array('query' => $destination));
}
$block['subject'] = t('Pending Comments');
// We theme our array of links as an unordered list.
$block['content'] = theme('item_list', $items);
}
elseif ($delta == 1 && user_access('administer nodes')) {
// Query the database for the 5 most recent unpublished nodes.
// Unpublished nodes have their status column set to 0.
$result = db_query_range('SELECT title, nid FROM {node} WHERE
status = 0 ORDER BY changed DESC', 0, 5);
$destination = drupal_get_destination();
while ($node = db_fetch_object($result)) {
$items[] = l($node->title, 'node/'. $node->nid). ' '.
l(t('[edit]'), 'node/'. $node->nid .'/edit',
array('query' => $destination));
}
$block['subject'] = t('Unpublished nodes');
// We theme our array of links as an unordered list.
$block['content'] = theme('item_list', $items);
}
return $block;
}
}
由于你有多个区块，在view操作下，你使用了if…elseif构造体。在每一种情况下，你检查被查看区块的$delta以决定你是否应该运行该段代码。在脚本形式里，它看起来是这样的：
if ($delta == 0) {
// Do something to block 0
}
elseif ($delta == 1) {
// Do something to block 1
}
elseif ($delta == 2) {
// Do something to block 2
}
在“未发布节点”区块启用后，区块的最终结果如图9-7所示。
图9-7，一个区块，列出了未发布节点
老葛的Drupal培训班 Think in Drupal
