Question

$row = $query->fetchAll(PDO::FETCH_ASSOC);
$num_rows = count($row);

for ($i = 0; $i < $num_rows; $i++)
{
    $title = htmlspecialchars($row[$i]['title']);
    $author =htmlspecialchars($row[$i]['author']);
    $school =htmlspecialchars($row[$i]['school']);
    $solution = $row[$i]['solution'];
    $notes = $row[$i]['notes'];

    $ad = array($title, $price, $author, $school, $contact, $content, $date);
    $inlcude = array($solutions, $notes);

    $field = 0;
    echo "<table border='1'>";    
    // foreach($inlcude as $in) This failled miserably 
    foreach ($ad as $post)
    {
        if ($field < 3) //The first three values are placed in the first row

        {
            echo "<td>$post</td>"; 
        }
        if ($field >= 3) 
        {         
            echo "<tr><td>$post</td><td>$in</td></tr>";   
        }
        $field++;
    }
    echo '</table>';
}

我有两个数组，我想在表格的不同列中显示它们。 $ ad显示完美，但我在第二列的$ inlcude中显示内容时遇到问题。我尝试过另一个foreach循环来迭代第二个数组的内容，但这实际上是通过将随机值放在表格的不同位置来搞砸我的表格。除了foreach循环之外，我不知道有任何其他方法来遍历数组。任何建议都将不胜感激。谢谢！

我希望图表看起来像$ p = $ post和$ i = $ in。此外，第一行中有三列，之后是每行中的两列

$p $p $p 

$p $i 

$p $i

Answer 1

假设您的数组格式正确，您可能希望使用array_shift（）。尝试这样的事情：

// Start by copying the $include array, because array_shift() is a destructive
//   operation and you might want to use $includes again.
$includes_copy = $include;
// Start with your leading <tr> cell.
echo "<tr>";
// Now loop your ad array.
foreach ($ad as $post) {
  //The first three values are placed in the first row.
  if ($field < 3) {
    echo "<td>$post</td>"; 
    $field++;
  }
  if ($field == 3) {
    echo "</tr>";  // Closing tags are good form.
  }
  if ($field >= 3) {
    // Using array_shift() will return the first element from the array.
    // The returned element will be removed from the array.
    $in = array_shift($includes_copy);
    // $post is populated from foreach(), $in is populated by array_shift(). 
    echo "<tr><td>$post</td><td>$in</td><td></td></tr>";
    $field += 3;   
  }
}

基本上，概念是foreach（$ array as $ val）在逻辑上等同于while（$ val = array_shift（$ array）），这意味着你可以同时运行两个foreach（）。唯一的区别是array_shift（）具有破坏性。

在同一个表中显示两个数组

1 个答案: