Question

我有一个用户选择项目的应用程序，然后它填充一个包含两列的表：类别和项目。它是这样的：

Category  | Items 
-----------------
PET       | Dog Food
HEALTH    | Tooth Brush
PET       | Cat Food
COLD FOOD | Steak
COLD FOOD | Eggs

在我的select语句中，我按类别按项目排序数据，我使用WHILE循环将数据放入数组。

while($listItems = mysql_fetch_array($results))
{
    $myArray[] = array("category" => $listItems["Category"],
                       "item"     => $listItems["Name"]);
}

当我做print_r（$ myArray）时;我得到这样的东西：

Array ( [0] => Array ( [category] => Cold Food [item] => Steak )
        [1] => Array ( [category] => Food      [item] => Eggs )
        [2] => Array ( [category] => Health    [item] => Tooth Brush )
        [3] => Array ( [category] => Pet       [item] => Cat Food )
        [4] => Array ( [category] => Pet       [item] => Dog Food ) )

我想要做的是将数据输出到这样的嵌套列表中。

冷食

牛排
蛋

健康

牙刷

宠物

猫粮
狗粮

欢迎任何帮助！谢谢！

Answer 1

试试这个：

while($listItems = mysql_fetch_array($results))
{
    $cat  = $listItems['Category'];
    $name = $listItems['Name'];

    if(!isset($myArray[$cat]))
      $myArray[$cat] = array();

    $myArray[$cat][] = $name;
}

然后，输出它你会这样做：

$buffer = '<ul>';
foreach($myArray as $cat => $items) {
   $buffer .= "<li>$cat</li><li><ul>";
   foreach($items as $item) {
      $buffer .= "<li>$item</li>";
   }
   $buffer .= '</ul></li>';
}
$buffer .= '</ul>';
echo $buffer;

Answer 2

试一试。我们的想法是将您的数据重组为更方便的形式，即按类别索引项目。

代码

<?php
    $items = array
    (
        array('category' => 'Cold Food', 'item' => 'Steak'),
        array('category' => 'Food', 'item' => 'Eggs'),
        array('category' => 'Health', 'item' => 'Tooth Brush'),
        array('category' => 'Pet', 'item' => 'Cat Food'),
        array('category' => 'Pet', 'item' => 'Dog Food'),
    );

    // Group the items by category.
    $itemsByCategory = array();

    foreach ($items as $item)
    {
        $category = $item['category'];
        $name     = $item['item'];

        if (!array_key_exists($category, $itemsByCategory))
            $itemsByCategory[$category] = array();

        $itemsByCategory[$category][] = $name;
    }

    // Output nested lists for the items.
?>  <ul>
<?php foreach ($itemsByCategory as $category => $items)
      {
?>        <li><?php echo htmlspecialchars($category); ?>

              <ul>
<?php           foreach ($items as $item)
                {
?>                  <li><?php echo htmlspecialchars($item); ?></li>
<?php           }
?>            </ul>
          </li>
<?php }
?>  </ul>

输出

冷食

牛排



食品

蛋



健康

牙刷



宠物

猫粮

狗粮

Answer 3

<?
//establish $vlink before
$query = 'select distinct (category) from list';
$result = mysql_query($query,$vlink);

while($row = mysql_fetch_array($results))
{
    $query1 = "select items from list where category = ".$row[0];
    $result1 = mysql_query($query1,$vlink);

    echo '<h1>'.$row[0].'</h1>';
    while($row1 = mysql_fetch_array($result1))
    {
        echo '<h2>'.$row1[0].'</h2>';
    }
}
?>

Answer 4

试试这个：

while($listItems = mysql_fetch_array($results)) 
{
     $myArray[$listItems["Category"]][] = $listItems["Name"] 
}

如何在PHP（noob）中从数组创建嵌套列表

4 个答案:

代码

输出