在多维数组中搜索一个键，然后用 PHP 更改一个值 [英] Searching for a key in a multidimensional array then changing a value with PHP

问题描述

我有一个像这样的多维数组

I have a multidimensional array that looks like this

[0] => Array
    (
        [recordId] => 5
        [leaf] => 1
        [children] => Array
            (
                [0] => Array
                    (
                        [recordId] => 6
                        [leaf] => 1
                        [children] => Array
                            (
                                [0] => Array
                                    (
                                        [recordId] => 7
                                        [leaf] => 1
                                    )
                            )
                    )
                [1] => Array
                    (
                        [recordId] => 8
                        [leaf] => 1
                        [children] => Array
                            (
                                [0] => Array
                                    (
                                        [recordId] => 9
                                        [leaf] => 1
                                    )
                                [1] => Array
                                    (
                                        [recordId] => 10
                                        [leaf] => 1
                                    )
                            )
                    )
            )
    )

每个节点都有一个默认为 TRUE 的 'leaf' 键，如果还有其他节点，则有一个 'children' 数组.

Each node has a 'leaf' key that is TRUE by default and has a 'children' array if there are further nodes down.

如果节点中包含一个 'children' 数组，我需要将 'leaf' 键值设置为 FALSE.这样，只有最终节点具有叶子 = TRUE 指定.

I need to set the 'leaf' key value to FALSE if there is a 'children' array contained in the node. That way only final nodes have the leaf = TRUE designation.

我尝试过搜索，但找不到代码来执行我需要的操作，而且我无法围绕我认为需要的递归函数.

I've tried searching but can't find code to do what I need and I can't wrap my head around the recursive function that I believe is needed.

有什么想法可以在 PHP 中实现吗?

Any ideas how I could accomplish this in PHP?

感谢您的帮助.

推荐答案

理论上这应该可行:

function findChild(&$array){
     foreach($array as &$arr){
            if(isset($arr['children'])){
                  $arr['leaf'] = 0; //there are children
                  findChild($arr['children']);
            }
            else {
                  $arr['leaf'] = 1; //there are no children
            }
     }
}

这是一个工作演示:http://codepad.org/AnYiRpES

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