<?php
$array = [
[
'id' => 1,
'title' => 'dir 1',
'parent_id' => 0,
],
[
'id' => 2,
'title' => 'dir 2',
'parent_id' => 0,
],
[
'id' => 3,
'title' => 'dir 3',
'parent_id' => 2,
],
[
'id' => 4,
'title' => 'dir 4',
'parent_id' => 3,
],
[
'id' => 5,
'title' => 'dir 5',
'parent_id' => 6,
],
[
'id' => 6,
'title' => 'dir 6',
'parent_id' => 0,
],
];
function build_tree($array, $parent_id = 0)
{
$result = [];
foreach ($array as $item) {
if ($item['parent_id'] == $parent_id) {
$new_item = $item;
$new_item['children'] = build_tree($array, $new_item['id']);
$result[] = $new_item;
}
}
return $result;
}
$tree = build_tree($array);
print_r($tree);
- Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
- Array
(
[0] => Array
(
[id] => 1
[title] => dir 1
[parent_id] => 0
[children] => Array
(
)
)
[1] => Array
(
[id] => 2
[title] => dir 2
[parent_id] => 0
[children] => Array
(
[0] => Array
(
[id] => 3
[title] => dir 3
[parent_id] => 2
[children] => Array
(
[0] => Array
(
[id] => 4
[title] => dir 4
[parent_id] => 3
[children] => Array
(
)
)
)
)
)
)
[2] => Array
(
[id] => 6
[title] => dir 6
[parent_id] => 0
[children] => Array
(
[0] => Array
(
[id] => 5
[title] => dir 5
[parent_id] => 6
[children] => Array
(
)
)
)
)
)
- Output for 8.3.5
- Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Array
(
[0] => Array
(
[id] => 1
[title] => dir 1
[parent_id] => 0
[children] => Array
(
)
)
[1] => Array
(
[id] => 2
[title] => dir 2
[parent_id] => 0
[children] => Array
(
[0] => Array
(
[id] => 3
[title] => dir 3
[parent_id] => 2
[children] => Array
(
[0] => Array
(
[id] => 4
[title] => dir 4
[parent_id] => 3
[children] => Array
(
)
)
)
)
)
)
[2] => Array
(
[id] => 6
[title] => dir 6
[parent_id] => 0
[children] => Array
(
[0] => Array
(
[id] => 5
[title] => dir 5
[parent_id] => 6
[children] => Array
(
)
)
)
)
)
preferences:
274.64 ms | 409 KiB | 291 Q