使用CakePHP中的标题按字母顺序列出记录

Question

我正在显示用CakePHP编写的应用程序的主题列表，如下所示：

<ul>
    <?php foreach ($topics as $topic): ?>
        <li>
            <?php echo $topic['Topic']['title']; ?>
        </li>
        <?php endforeach; ?>
</ul>

我想做的就是显示它们：

<h3>A</h3>
<ul>
    <li>animals</li>
    <li>anger</li>
    <li>age</li>
</ul>

<h3>B</h3>
<ul>
    <li>bat</li>
    <li>bird</li>
</ul>

etc...

我该怎么做？请记住，我也可以有数字，例如3D

ARRAY

array(
    (int) 0 => array(
        'Topic' => array(
            'id' => '1',
            'title' => 'awesome'
        ),
        'TopicPost' => array(
            (int) 0 => array(
                'id' => '1',
                'topic_id' => '1',
                'post_id' => '107'
            )
        )
    ),
    (int) 1 => array(
        'Topic' => array(
            'id' => '2',
            'title' => 'amazing'
        ),
        'TopicPost' => array(
            (int) 0 => array(
                'id' => '2',
                'topic_id' => '2',
                'post_id' => '107'
            )
        )
    ),
    (int) 2 => array(
        'Topic' => array(
            'id' => '3',
            'title' => 'jazz'
        ),
        'TopicPost' => array(
            (int) 0 => array(
                'id' => '3',
                'topic_id' => '3',
                'post_id' => '107'
            )
        )
    )
)

Answer 1

我的php有点生疏，所以我为可能的错误道歉，但逻辑很有希望清楚。你可以试试这个：

    <?php  
        $lastTopic = ' ';
        $first = true;
        $close = false;
        foreach ($topics as $topic): 
            $lastLetter = substr($lastTopic, 0, 1);
            $thisLetter = substr($topic['Topic']['title'], 0, 1);
            $isNewLetter =  $lastLetter == $thisLetter;
            if ($isNewLetter):
                $close = true;
                if($first) $first = false;
                else echo "</ul>";
    ?>
                <h3><?php echo $newLetter ?></h3>
                <ul>
                <?php endif; ?>
                    <li>
                        <?php 
                            echo $topic['Topic']['title']; 
                            $lastTopic = $topic['Topic']['title']; 
                        ?>
                    </li>

         <?php endforeach; ?>
         <?php if($close) echo "</ul>"; ?>
</ul>

基本思路是每次遇到以新字母开头的主题时，都会关闭html列表并创建一个新标题。这当然假定列表已经排序。

Answer 2

您需要做的是首先创建一个排序项目数组，您可以foreach通过。当您构建此数组时，请使用每个主题的第一个字母，并创建具有相同字母或数字的主题列表。

鉴于$topic等于：

$topic = array(
    (int) 0 => array(
        'Topic' => array(
            'id' => '1',
            'title' => 'awesome'
        ),
        'TopicPost' => array(
            (int) 0 => array(
                'id' => '1',
                'topic_id' => '1',
                'post_id' => '107'
            )
        )
    ),
    (int) 1 => array(
        'Topic' => array(
            'id' => '2',
            'title' => 'amazing'
        ),
        'TopicPost' => array(
            (int) 0 => array(
                'id' => '2',
                'topic_id' => '2',
                'post_id' => '107'
            )
        )
    ),
    (int) 2 => array(
        'Topic' => array(
            'id' => '3',
            'title' => 'jazz'
        ),
        'TopicPost' => array(
            (int) 0 => array(
                'id' => '3',
                'topic_id' => '3',
                'post_id' => '107'
            )
        )
    )
);

您可以使用以下代码处理数组：

<?
foreach($topic as $currentTopic):
    $thisLetter = strtoupper($currentTopic['Topic']['title'][0]);
    $sorted[$thisLetter][] = $currentTopic['Topic']['title'];
    unset($thisLetter);
endforeach;

foreach($sorted as $key=>$value):

    echo '<h3>'.$key.'</h3>';
    echo '<ul>';

    foreach($value as $thisTopic):
        echo '<li>'.$thisTopic.'</li>';
    endforeach;

    echo '</ul>';

endforeach;
?>

已成功测试。

Answer 3

试试这些代码：

<ul style="list-style-type:upper-alpha">
  <?php foreach ($topics as $topic): ?>
    <li>
        <?php echo $topic['Topic']['title']; ?>
    </li>
    <?php endforeach; ?>
</ul>