合并具有相同键名的多维数组[重复]

Question

我有一个多维数组，我想在表格中显示这些值。

代码如下：

$attributes = [
    [
        "attributeName"=> "Name",
        "value"=> "Paul"
    ],
    [
        "attributeName"=> "Name",
        "value"=> "Steve"
    ],
    [
        "attributeName"=> "Name",
        "value"=> "John"
    ],
    [
        "attributeName"=> "Name",
        "value"=> "Andrew"
    ],

    [
        "attributeName"=> "Destination",
        "value"=> "London"
    ],
    [
        "attributeName"=> "Destination",
        "value"=> "Paris"
    ],
    [
        "attributeName"=> "Destination",
        "value"=> "Ankara"
    ],
    [
        "attributeName"=> "Destination",
        "value"=> "Kuwait"
    ],
];

我希望将输出放在一张桌子上，其中 thead 是 Name 和 Destination，而 td 是 Name 和 Destinations 的值。

或者这个

姓名：保罗、史蒂夫、约翰、安德鲁

目的地：伦敦、巴黎、安卡拉、科威特

Answer 1

您可以使用array_reduce 将所有属性分组到一个输出数组中：

$output = array_reduce($attributes, function ($carry, $arr) {
    $carry[$arr['attributeName']][] = $arr['value'];
    return $carry;
}, array());

输出：

Array
(
    [Name] => Array
        (
            [0] => Paul
            [1] => Steve
            [2] => John
            [3] => Andrew
        )
    [Destination] => Array
        (
            [0] => London
            [1] => Paris
            [2] => Ankara
            [3] => Kuwait
        )
)

要将其输出为表格，您可以使用foreach 循环：

echo "<table>\n";
foreach ($output as $key => $values) {
    echo "<tr><td>$key</td><td>" . implode('</td><td>', $values) . "</td></tr>\n";
}
echo '</table>';

输出：

<table>
<tr><td>Name</td><td>Paul</td><td>Steve</td><td>John</td><td>Andrew</td></tr>
<tr><td>Destination</td><td>London</td><td>Paris</td><td>Ankara</td><td>Kuwait</td></tr>
</table>

Demo on 3v4l.org