Php 如何将数组与标识符合并？

我有两个这样的阵列：

$arr1 = ['yellow' => 1, 'red', => 5];
$arr2 = ['gray' => 3, 'black' => 8, 'orange' => 6, 'yellow' => 9];

我想要这个结果：

$merged = ['yellow' => [1, 'arr1'], 'red', => [5, 'arr1'], 'gray' => [3, 'arr2'], 'black' => [8, 'arr2'], 'orange' => [6, 'arr2'], 'yellow' =>  [9, 'arr2']];

---

但正如我阅读的文档所述，它没有这样的选项。有什么功能可以帮我完成吗？

这可能就是您想要的：

<?php
$input = [
    'arr1' => ['yellow' => 1, 'red' => 5],
    'arr2' => ['yellow' => 10, 'gray' => 3, 'black' => 8, 'orange' => 6]
];
$output = [];
array_walk($input, function ($entry, $source) use (&$output) {
    foreach ($entry as $key=>$val) {
        $output[$key][] = [$val, $source];
    }
});
print_r($output);

---

好的，我花了更长的时间才得出这个答案，因为你的问题中有一个bug。请参见数组1中“红色”后面的“，”

$arr1 = ['yellow' => 1, 'red' => 5];
$arr2 = ['gray' => 3, 'black' => 8, 'yellow' => 3, 'orange' => 6];

$arrays = ['arr1','arr2'];
$merged = [];

foreach ($arrays as $array) {
  foreach (${$array} as $color => $value) {
    $merged[$color][] = [$value,$array];
  }
}

echo '<pre>';
print_r($merged);
echo '</pre>';

---

基于@arkascha，回答一个处理重复项的版本：

---

在arr1和arr2中都可以找到黄色吗？？或者别的什么color@Vanojx1对它们不是独一无二的，我需要保留它们them@stack希望你很好，事情发展如你所愿；-）如果两个数组中都出现“黄色”，则此代码无法正常工作。它不会同时保留这两个值，但会覆盖。@KIKOSoftware在这种情况下将输出什么？@Chetan:输出太长，无法进行注释。。。但是如果你想知道，可以试试代码。@KIKOSoftware当然也可以，只要稍加修改。我相应地修改了答案。问题本身并没有具体说明这一要求，这就是为什么我完全实现了所要求的。此修改显然会更改输出格式定义。

$arr1 = ['yellow' => 1, 'red' => 5];
$arr2 = ['gray' => 3, 'black' => 8, 'yellow' => 3, 'orange' => 6];

$arrays = ['arr1','arr2'];
$merged = [];

foreach ($arrays as $array) {
  foreach (${$array} as $color => $value) {
    $merged[$color][] = [$value,$array];
  }
}

echo '<pre>';
print_r($merged);
echo '</pre>';

Array
(
    [yellow] => Array
        (
            [0] => Array
                (
                    [0] => 1
                    [1] => arr1
                )
            [1] => Array
                (
                    [0] => 3
                    [1] => arr2
                )
        )
    [red] => Array
        (
            [0] => Array
                (
                    [0] => 5
                    [1] => arr1
                )
        )
    [gray] => Array
        (
            [0] => Array
                (
                    [0] => 3
                    [1] => arr2
                )
        )
    [black] => Array
        (
            [0] => Array
                (
                    [0] => 8
                    [1] => arr2
                )
        )
    [orange] => Array
        (
            [0] => Array
                (
                    [0] => 6
                    [1] => arr2
                )
        )
)

<?php
  $input = [
    'arr1'=> ['yellow' => 1,'red' => 5, 'black' => 4],
    'arr2'=> ['gray' => 3,'yellow' => 3, 'black' => 8,'orange' => 6],
    'arr3'=> ['orange' => 2]
  ];

  $output = [];
  array_walk($input, function ($entry, $source) use (&$output) {
    foreach ($entry as $key=>$val) {
      if(!array_key_exists($key, $output))
        $output[$key] = [[$val, $source]];
      else
        $output[$key][] = [$val, $source];
    }
  });

  echo print_r($output);

?>