CODEWITHSUNDEEP
phparraysrecursionmultidimensional-arrayexplode
Jens Törnell
Jens Törnell

Reputation: 24788

Parse a flat, associative array with keys representing a delimited key path into a multidimensional, associative array

I've seen many questions around this topic, but not any near the case I have.

I have like a really simple folder path as key and want to make the array into a multidimensional array.

My current array

[
  'projects'                  => 'A path',
  'projects/project-a'        => 'Another path',
  'projects/project-b'        => 'Yet another path',
  'about/me/and/someone/else' => 'Path about me'
]

This is the result I try to get:

[
  'projects' => [
    'path'     => 'A path',
    'children' => [
      'project-a' => [
        'path' => 'Another path'
      ],
      'project-b' => [
        'path' => 'Yet another path'
      ]
    ]
  ],
  'about' => [
    'children' => [
      'me' => [
        'children' => [
          'and' => [
            'children' => [
              'someone' => [
                'children' => [
                  'else' => [
                    'path' => 'Path about me'
                  ]
                ]
              ]
            ]
          ]
        ]
      ]
    ]
  ]
]

Maybe I can use array_walk_recursive somehow. I know explode can be used to split the parts by /.

Notes

Upvotes: 0

Views: 157

Answers (1)

splash58
splash58

Reputation: 26153

$result = [];

foreach($arr as $k=>$v) {
  $path = explode('/', $k);
  // temporary array for one path
  $temp = [];
  // Pointer, used to add a next level 
  $p = &$temp;
  // Save the last part of path
  $last = array_pop($path);
  foreach($path as $s) {
    // Make level upto the last
    $p[$s] = ['children' => []];
    $p = &$p[$s]['children'];
  }
 // Add a value 
 $p[$last] = ['path' => $v];
 $result = array_merge_recursive($result, $temp);
}
print_r($result);

demo

Upvotes: 2

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