我的应用程序中有以下代码，它将按字母顺序显示主题列表，并按每个部分块中的第一个标签名称拆分它们。
例如：
A
animal
amazing
B
bat
baseball
代码如下：
<?php
foreach($topics as $currentTopic):
$thisLetter = strtoupper($currentTopic['Topic']['title'][0]);
$sorted[$thisLetter][] = $currentTopic['Topic']['title'];
unset($thisLetter);
endforeach;
foreach($sorted as $key=>$value):
echo '<h3 class="alpha"><span>'.$key.'</span></h3>';
echo '<ol class="tags main">';
foreach($value as $thisTopic):
echo '<li class="tag"><em>0</em>';
echo $this->Html->link('<strong>'.$thisTopic['Topic']['title'].'</strong>',
array('controller'=>'topics','action'=>'view','slug'=>$thisTopic['Topic']['slug']),
array('escape'=>false,'rel'=>'tag'));
echo '</li>';
endforeach;
echo '</ol>';
endforeach;
?>
但是，由于我现在拆分了数组，我发现很难访问数组中的其他数据，例如用于链接的主题 slug，因为 $thisTopic 变量只存储标题和其他所需数据。我还想在<em>中显示主题帖子计数，因此如果主题有 4 个相关帖子，则显示<em>4</em>
当前正在执行我正在执行的操作会给出错误：Fatal error: Cannot use string offset as an array因为我拆分了数组...
谁能帮忙？
如果我调试$topics数组，我会得到以下内容：
array(
(int) 0 => array(
'Topic' => array(
'id' => '5',
'title' => 'amazing',
'slug' => 'amazing'
),
'TopicPost' => array(
(int) 0 => array(
'id' => '9',
'topic_id' => '5',
'post_id' => '101'
)
)
),
(int) 1 => array(
'Topic' => array(
'id' => '4',
'title' => 'amazingness',
'slug' => 'amazingness'
),
'TopicPost' => array(
(int) 0 => array(
'id' => '8',
'topic_id' => '4',
'post_id' => '100'
),
(int) 1 => array(
'id' => '12',
'topic_id' => '4',
'post_id' => '101'
),
(int) 2 => array(
'id' => '4',
'topic_id' => '4',
'post_id' => '119'
)
)
),...
您收到错误是因为您只存储主题的标题。
我建议存储整个主题信息，而不仅仅是标题：
$orderedTopics= array();
foreach ($topics as $topic) {
$orderedTopics[strtoupper($topic['Topic']['title'][0])][] = $topic;
}
然后，要显示它：
foreach ($orderedTopics as $section=>$topics) {
echo $section;
foreach ($topics as $topic) {
echo 'Title: ' . $topic['Topic']['title'];
echo 'Body: ' . $topic['Topic']['body'];
//etc...
}
}