如何在php循環內的兩個不同div中獲取值

Question

我正在嘗試獲得這樣的循環。 假設我在表test有 20 行，我需要在如下所示的循環中獲取其 id 值。

 <section class="test">
       <div class="n4">

         <div class="n2">
              1 // first row id
         </div>

        <div class="n21">
            2 // second row id
        </div>

    </div>
    </section>

    <section class="test">
       <div class="n4">

         <div class="n2">
              3 // third row id
         </div>

        <div class="n21">
            4 // fourth row id
        </div>

    </div>
    </section> 

      ..... <section> ....upto all ids in the row

我試圖做的是假設表測試有 20 行。

    <?php
    $query=$db->query("SELECT * FROM test");  
    $counter=1;
    foreach($query as $row)
    {
    ?>
    <section class="test">
       <div class="n4">

       <?php  if($counter %2 !=0)  ?>     
         <div class="n2">
            <?php echo $row['id']; ?> 
         </div>
         <?php else  ?>
        <div class="n21">
            <?php echo $row['id']; ?>
        </div>

    </div>
    </section>

     <?php
  $counter++;

  } ?>

這並沒有顯示確切的結果。

請問有什么幫助嗎？

Answer 1

你的代碼有問題，讓我們試試這個

<?php
$query=$db->query("SELECT * FROM test");
$counter=1;
foreach($query as $row)
{
    ?>
    <section class="test">
    <div class="n4">

    <?php  if($counter %2 !=0): /* you've missing ":" symbol*/ ?>   
        <div class="n2">
        <?php echo $row['id']; ?> 
        </div>
    <?php else: /* you've missing ":" symbol*/ ?>
        <div class="n21">
        <?php echo $row['id']; ?>
        </div>
    <?php endif; /* you dont need close bracket, but you need "endif" */ ?> 
    <?php $counter++; ?>
    </div>
    </section>

<?php  } ?>

Answer 2

這種方式將如您所願，我也嘗試過

<?php
$query = [['id' => 1], ['id' => 2], ['id' => 3]] ; // example of result
for ($i=0; $i < count($query); $i+=2) { 
    try {
        ?>
    <section class="test">
        <div class="n4">
            <div class="n2">
                <?php echo @$query[$i]['id'] // ignore error ?>
            </div>
            <div class="n21">
                <?php echo @$query[$i+1]['id'] // ignore error ?>
            </div>
        </div>
    </section>
        <?php
    } catch (Exception $e) {

    }
}

以上會產生這樣的結果

<section class="test">
    <div class="n4">
        <div class="n2">
            1
        </div>
        <div class="n21">
            2
        </div>
    </div>
</section>
<section class="test">
    <div class="n4">
        <div class="n2">
            3
        </div>
        <div class="n21">

        </div>
    </div>
</section>