如何向自定义块内容发送数据

Answer 1

这在这里行不通：

$block['content'] += array(
    '#theme' => 'guestbook_last_entries',
    '#entries' => $entry,
);

如果您需要一个数组作为结果，也许您需要这个：

// note that I replaced += with a simple = and added two brackets that will create a new element in that array $block['content']
$block['content'][] = array(
    '#theme' => 'guestbook_last_entries',
    '#entries' => $entry,
);