使用预定义键转置 PHP 多维数组

Question

我有一个包含 3 个键（"length"、"width" 和“高度”）的多维数组。每个键都与一个值数组相关联：

$data = [
    "length" => ["12", "44"],
    "width" => ["22", "45"],
    "height" => ["22", "34"]
];

如何将每个键的列转置为 3 列的行，如下所示：

$rows = [
    ["length" => "12", "width" => "22", "height" => "22"],
    ["length" => "44", "width" => "45", "height" => "34"]
];

Answer 1

你可以试试这个来得到你说的数组

   $height = array(12,44);
$width = array(20,50);
$length = array(30,50);
$new_array[0] = $height[0];
$new_array[1] = $width[0];
$new_array[2] = $length[0];
$new_array2 = $new_array[1];
print_r($new_array);
echo "<br>";
print_r($new_array2);

Answer 2

以下函数将完成这项工作：

function transpose($data)
{
    $result = [];
    $keys = array_keys($data);
    for ($row = 0,  $rows = count(reset($data)); $row < $rows; $row++) {
        foreach ($keys as $key) {
            $result[$row][$key] = $data[$key][$row];
        }
    } 

    return $result;
}

请注意，该函数是一个通用解决方案，它不依赖于键的名称，也不依赖于每个键的条目数。

Answer 3

晚会迟到了，但这里有一个行之有效的方法

$data = [
    "length" => ["12", "44"],
    "width" => ["22", "45"],
    "height" => ["22", "34"]
];

foreach ($data as $n => $v) foreach ($v as $vn => $vv) $new[$vn][$n]=$vv;
print_r($new);

https://www.tehplayground.com/OvSeQW8X6JBiDZ4i

使用预定义键转置 PHP 多维数组

Transpose a PHP multidimensional array with predefined keys

php

arrays

transpose

associative-array

multidimensional-array