php - 如何将标题放入 while 循环中，仅用于单个结果而不是重复结果？

Question

Vehicle num    total_amount
TEST V 1234    500
TEST V 1234    500
TEST V 1234    500
TEST w 785     1000
TEST w 785     1000
TEST Z 589     700
TEST Z 589     700
TEST Z 589     700

但我想喜欢这个。

Vehicle num    total_amount
TEST V 1234    500
TEST V 1234    500
TEST V 1234    500


Vehicle num    total_amount
TEST w 785     1000
TEST w 785     1000


Vehicle num    total_amount
TEST Z 589     700
TEST Z 589     700
TEST Z 589     700

我想为每个组车辆显示上面的标题。

  <?php

#other code

$track = null;
$total = 0;

while ($fet_all = mysql_fetch_array($query_all)) :?>    
  <?php if ($track !== null && $track !== $fet_all['truckk_number']): ?>
    <tr>
        <td colspan="3">Vehicle No:</td>
        <td><?php echo $track; ?></td>
    </tr>
    <tr>
        <td colspan="3">Total:</td>
        <td><?php echo $total; ?></td>
    </tr>
    <?php $total = $fet_all['total']; ?>
  <?php else: ?>
    <?php $total += $fet_all['total'];  ?>
  <?php endif; ?>
  <tr class="accord-content even bg-gray" style="color:#698602 !important;">
    <td><?php echo $fet_all['id']; ?></td>
    <td><?php echo $fet_all['ownername']; ?></td>
    <td><?php echo $fet_all['truckk_number']; ?></td>
    <td><?php echo $fet_all['total']; ?></td>
  </tr>
  <?php $track = $fet_all['truckk_number']; //add this line ?>
<?php endwhile; ?>
<?php if ($total > 0): ?>
    <tr>
        <td colspan="3">Vehicle No:</td>
        <td><?php echo $track; ?></td>
    </tr>
    <tr>
        <td colspan="3">Total:</td>
        <td><?php echo $total; ?></td>
    </tr>
<?php endif; ?>

Answer 1

$v = false;
while ($row = someReadFunction()) {
    if ($row["vehicle"] != $v) echo "Write header here...";
    echo implode (" ", $row); // Or your preferred way to display it.
    $v = $row["vehicle"];
};