PHP更深一层的阵列中的每个循环发 [英] PHP One level deeper in array each loop made

问题描述

我通过一个数组试图循环，增加每一次一个新的水平，以另一个数组。让我说明 - 变量$改编的价值观是不同的，每次

I'm trying to loop through one array, adding a new level to another array each time. Let me illustrate - variable $arr's values are different each time

$arr = array("1","5","6");

循环

$index[$arr[0]];

循环

$index["1"][$arr[1]]  // "1" since this key was filled in by the previous loop, continuing with a new key

循环

$index["1"]["5"][$arr[2]] // same as previous loop

- 循环对所有$改编的项目，做的，结果是$指数[1] [5] [6] -

--looped over all $arr's items, done, result is $index["1"]["5"]["6"]--

问题是我不知道的 $改编阵列多少值包含的内容。然后，我不知道如何从，例如， $指数[1] 时的第一个值 $改编一直循环到下一个阵列级别（换句话说，添加另一个键）。

The problem is I won't know how much values the $arr array contains. Then, I don't know how to continue from, for example, $index["1"] when the first value of $arr has been looped to the next array level (other words: add another key)..

有人吗？

推荐答案

您可以在这里使用引用：

You can use references here:

$a = array("1","5","6");
$b = array();
$c =& $b;

foreach ($a as $k) {
    $c[$k] = array();
    $c     =& $c[$k];
}

输出

Array 
    (
    [1] => Array
        (
            [5] => Array
                (
                    [6] => Array
                        (
                        )
                )
        )
)

要覆盖与其他一些价值的最后一个元素，可以只添加一行：

To overwrite the last element with some other value, you can just add the line:

$c = 'blubber';

在循环后，因为的 $ C 的是最深的阵列级别，当循环结束的参考。

after the loop, because $c is a reference to the deepest array level, when the loop is finished.

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