如何反转嵌套数组 PHP 的键=>值顺序？

Question

所以数组看起来像这样：

$folderIDs = array(
 "FolderID"=>0,
 "FolderName"=>"Main Folder",
 "Folders"=>array(
  array(
   "FolderID"=>23,
   "FolderName"=>"First SubFolder",
   "Folders"=>array()
  ),
  array(
   "FolderID"=>4,
   "FolderName"=>"Second SubFolder",
   "Folders"=>array(
    array(
     "FolderID"=>99,
     "FolderName"=>"SecondSub SubFolder ",
     "Folders"=>array(
      array(
       "FolderID"=>27,
       "FolderName"=>"SecondSubSub SubFolder",
       "Folders"=>array()
      )
     )
    )
   )
  ),
  array(
   "FolderID"=>46,
   "FolderName"=>"Third SubFolder",
   "Folders"=>array()
  )
 )
);

数组可以 "more" 嵌套，因为 subsubsub 文件夹也可以有子文件夹等等。

我们想要一个看起来像这样的重构数组：

$reconstructed_folderIDs = array(
 0 => array(
  "FolderName" => "Main Folder",
  "ParentFolder" => "",
 ),
 23 => array(
  "FolderName" => "First SubFolder",
  "ParentFolder" => 0,
 ),
 4 => array(
  "FolderName" => "Second SubFolder",
  "ParentFolder" => 0,
 ),
 99 => array(
  "FolderName" => "SecondSub SubFolder",
  "ParentFolder" => 4,
 ),
 127 => array(
  "FolderName" => "SecondSubSub SubFolder",
  "ParentFolder" => 99,
 ),
 46 => array(
  "FolderName" => "Third SubFolder",
  "ParentFolder" => 0,
 ),
);

是否有快速或可行的解决方案？

提前致谢！

Answer 1

下面是一种相当糟糕的方法来获得你需要的结果，快速但肮脏。

function process(&$result, $record, $parent = NULL) {

  $f_id = $record['FolderID'];
  $f_name = $record['FolderName'];
  $f_data = $record['Folders'];

  if (!isset($result[$f_id])) 
      $result[$f_id] = [];  

  $result[$f_id]['FolderName'] = $f_name;
  $result[$f_id]['ParentFolder'] = $parent;

  if (empty($f_data)===FALSE)
      foreach( $f_data as $useless => $folder_record )      
          process($result, $folder_record, $f_id);      
}

$reconstructed_folderIDs = [];
process($reconstructed_folderIDs, $folderIDs );

如何反转嵌套数组 PHP 的键=>值顺序？

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