Online PHP editor | rfc for PPXul

@ 2023-04-12T22:26:27Z

<?php

$array = [
    [
        'id' => 67941,
        'parent_id' => 0,
        'name' => 'Requirement',
        'children' => [
            [
                'id' => 67942,
                'parent_id' => 67941,
                'name' => 'Sub Requirement',
                'children' => [
                    [
                        'id' => 67943,
                        'parent_id' => 67942,
                        'name' => 'Sub Sub Requirement',
                    ],
                ],
            ],
        ],
    ],
    [
        'id' => 67977,
        'parent_id' => 0,
        'name' => 'Requirement',
        'children' => [
            [
                'id' => 67978,
                'parent_id' => 67977,
                'name' => 'Sub Requirement',
                'children' => [
                    [
                        'id' => 67979,
                        'parent_id' => 67978,
                        'name' => 'Sub Sub Requirement',
                        'children' => [
                            [
                                'id' => 67980,
                                'parent_id' => 67979,
                                'name' => 'Sub Sub Sub Requirement',
                            ],
                        ],
                    ],
                ],
            ],
        ],
    ],
];
$needle = 67943;

$ritit = new RecursiveIteratorIterator(new RecursiveArrayIterator($array));
$result = null;
foreach ($ritit as $leafValue) {
    $path = [];
    foreach (range(0, $ritit->getDepth()) as $depth) {
        $obj = $ritit->getSubIterator($depth);
        $key = $obj->key();
        if ($key !== 'children') {
            $path[] = $key;
        }
        if ($obj->current() === $needle) {
            $result = $path;
            break 2;
        }

    }
}
var_export($result);

Output for git.master, git.master_jit, rfc.property-hooks: array ( 0 => 0, 1 => 0, 2 => 0, 3 => 'id', )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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