我无法通过多维数组正常排便

Question

我的文件夹和文件有一个多维数组。它看起来像这样：

$arr = array(
    0           => 'file.php',
    1           => 'file2.php',
    'folder1'   => array(
        'subfolder1'    => array(
            0       => 'subfile.php',
            1       => 'subfile2.php',
            2       => 'subfile3.php'
        )
    ),
    'folder2'   => array(
        0       => 'image.jpg',
        1       => 'image2.jpg',
        'subfolder2'    => array(
            0       => 'subimage3.jpg',
            1       => 'subimage4.jpg'
        ),
        'subfolder3'    => array(
            0       => 'subfile4.php',
            1       => 'subfile5.php'
        ),
    ),
);

我正在编写一个函数来遍历此数组以获取简单的文件列表及其路径。这是功能：

function multiarrToList($arr,$list = false,$path = false){
    if(!is_array($list)){
        $list = array();    
    }
    if(!is_array($path)){
        $path[] = '';
    }

    foreach($arr as $key => $value){

        if(is_array($value)){

            $path[] = $key;

            $list = multiarrToList($arr[$key],$list,$path);
        
        } else {
            $list[] = array(
                'filename'      => $value,
                'path'          => $path
            );
        }

    }
    
    return $list;
}

我卡住了，因为我正在正确循环以获取每个文件名，但路径无法正常工作。您可以在第 5 项的结果中看到它，依此类推。有重复的文件夹，不应该在他的路径中。结果：

    Array
(
    [0] => Array
        (
            [filename] => file.php
            [path] => Array
                (
                    [0] => 
                )

        )

    [1] => Array
        (
            [filename] => file2.php
            [path] => Array
                (
                    [0] => 
                )

        )

    [2] => Array
        (
            [filename] => subfile.php
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => subfolder1
                )

        )

    [3] => Array
        (
            [filename] => subfile2.php
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => subfolder1
                )

        )

    [4] => Array
        (
            [filename] => subfile3.php
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => subfolder1
                )

        )

    [5] => Array
        (
            [filename] => image.jpg
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => folder2
                )

        )

    [6] => Array
        (
            [filename] => image2.jpg
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => folder2
                )

        )

    [7] => Array
        (
            [filename] => subimage3.jpg
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => folder2
                    [3] => subfolder2
                )

        )

    [8] => Array
        (
            [filename] => subimage4.jpg
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => folder2
                    [3] => subfolder2
                )

        )

    [9] => Array
        (
            [filename] => subfile4.php
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => folder2
                    [3] => subfolder2
                    [4] => subfolder3
                )

        )

    [10] => Array
        (
            [filename] => subfile5.php
            [path] => Array
                (
                    [0] => 
                    [1] => folder1
                    [2] => folder2
                    [3] => subfolder2
                    [4] => subfolder3
                )

        )

)

感谢任何想法。

Answer 1

你已经明白了其中的要旨。使这项工作的几个变化如下：

• 将 function multiarrToList($arr, $list = false, $path = false){ 更改为 function multiarrToList($arr, $list = [], $path = []){。我们将它们设置为默认的空数组。这可以帮助您完全消除对下一个 if 检查的需要。

• $path[] = $key; 是重复的原因。这是因为对于每个新的后续 is_array() 检查，总是包括以前的 $key。要纠正此问题，请制作数组的新副本，将当前 $key 添加到其中，并将数组的这个新副本传递给它的下一个子调用。

• $list = multiarrToList($arr[$key],$list,$path); - 在此，我建议用子递归结果覆盖当前 $list 的 array_merge()，而不是覆盖 $list。

• multiarrToList($arr[$key],$list,$path);不用再传$list了。只需传递一个空数组，让它只 return 只有递归子层次结构结果 才能在父级顶层合并。

片段：

<?php

function multiarrToList($arr, $list = [], $path = []){
    foreach($arr as $key => $value){
        if(is_array($value)){
            $new_path = $path;
            $new_path[] = $key;
            $list = array_merge($list, multiarrToList($value, [], $new_path));
        } else {
            $list[] = [
                'filename' => $value,
                'path' => $path
            ];
        }

    }
    
    return $list;
}
 

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