I cant loop properly through multdimensional array

Question

I have an multidimesional array of my folders and files. It looks like this:

$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' ), ), );

I am writing a function to loop through this array to get simple list of files with their pathes. Here is function:

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; }

I am stuck because I am looping properly to get each filenames but pathes arent working properly. You can see it in result from item 5 and so on. There is repeat of folder which shouldnt be there int he path. Result:

 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 ) ) )

Thanks for any idea.

mighty_dev · Accepted Answer · 2022-05-30 04:08:21Z

You have already figured out the gist of it. A couple of changes to make this work are as below:

Change function multiarrToList($arr, $list = false, $path = false){ to function multiarrToList($arr, $list = [], $path = []){. We will set them as default empty arrays. This helps you completely remove the need for the next if checks.
$path[] = $key; is the reason for the duplicacy. This is because for every new subsequent is_array() checks, the previous $key is always included. To rectify this, make a new copy of the array, add the current $key to it and pass this new copy of the array to it's next child calls.
$list = multiarrToList($arr[$key],$list,$path); - In this, instead of overwriting $list, I would suggest array_merge() of current $list with the child recursive result.
multiarrToList($arr[$key],$list,$path); No need to pass $list again. Just pass an empty array and let it just return only the recursive child hierarchical results for getting it merged at the parent top level.

Snippet:

<?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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