统计数组项并在一定数量后添加div

Question

$specs = array ('Name' => 'Cleopatra', 'Year' => '2008', 'Length' => '20ft', 'Make' => 'manufacturer', 'Model' => 'model', 'Engines Count' => '2', 'Fuel' => 'Diesel', 'Rudder' => 'rudder', 'Keel' => 'keel', 'Price' => '$1'); 

foreach ($specs as $label => $detail) {
  echo "<tr>";  
  echo "<th>{$label}</th>";
  echo "<td>{$detail}</td>";
  echo "</tr>";
}

foreach循环在每行中返回1列。如何呈现每行4列，如下所示

   <tr>
      <th>Label</th>
      <td>Detail</td>
      <th>Label</th>
      <td>Detail</td>
      <th>Label</th>
      <td>Detail</td>
      <th>Label</th>
      <td>Detail</td>
    </tr>
    <tr>
      <th>Label</th>
      <td>Detail</td>
      <th>Label</th>
      <td>Detail</td>
      <th>Label</th>
      <td>Detail</td>
      <th>Label</th>
      <td>Detail</td>
    </tr>

Answer 1

只需添加计数器，就像这样：

echo "<tr>";
foreach ($specs as $label => $detail) {
  if($i%4 == 0 && $i != 0) { 
    echo "</tr>";
    echo "<tr>";
  }
  echo "<th>{$label}</th>";
  echo "<td>{$detail}</td>";
  $i++;
}
echo "</tr>";

更新:固定边缘情况$i=0和<tr>的顺序正确

Answer 2

设置一个计数器，每4次迭代打印一个新的<tr>。

$i = 0;
echo '<tr>';
foreach ($specs as $label => $detail) {
  if($i !== 0 && $i%4 === 0){
     echo '</tr><tr>';
  }
  echo "<th>{$label}</th>";
  echo "<td>{$detail}</td>";
  $i++;
}
echo '</tr>';

Answer 3

如果你记得学校的数学，你可以使用mod operator来得到除法运算的剩余部分。这就是你需要得到你想要的东西。

 echo "<tr>"; 
foreach ($specs as $label => $detail) 
{
  $counter++;
  //get remainder of division by 4, when 1 create new row
 if ($counter % 4 == 1)
 {
  echo "</tr>"; 
  echo "<tr>"; 
 }
 echo "<th>{$label}</th>";
 echo "<td>{$detail}</td>";


}   
echo "</tr>";