通过键数组创建嵌套数组 [英] Create nested array by array of keys

问题描述

在按键数组创建嵌套数组并为最后一个嵌套项分配值时，我遇到了一些困难.

I've some difficulties creating a nested array by array of keys and assigning a value for the last nested item.

例如，让$value = 4;和$keys = ['a', 'b', 'c'];

最终结果应该是:

[
  'a' => [
    'b' => [
      'c' => 4
    ]
  ]
]

我尝试了递归，但没有成功. 任何帮助将不胜感激.

I've tried with a recursion, but without success. Any help would be greatly appreciated.

推荐答案

您不需要递归，只需从右到左执行即可.

you don't need recursion, just do it from the right to left:

$a = $value;
for ($i = count($keys)-1; $i>=0; $i--) {
  $a = array($keys[$i] => $a);
}

或@felipsmartins中甚至更短的版本:

or the even shorter version from @felipsmartins:

$a = $value;
foreach (array_reverse($keys) as $valueAsKey) $a = [$valueAsKey => $a]; 

这篇关于通过键数组创建嵌套数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！