Online PHP editor | rfc for umhv9

@ 2021-09-20T19:46:16Z

<?php

$tree = [
    [
        "id" => 1573695284631,
        "name" => "Cars",
        "pid" => 0,
        "children" => [
            [
                "id" => 1573695292010,
                "name" => "Audi",
                "pid" => 1573695284631
            ],
            [
                "id" => 1573695305619,
                "name" => "BMW",
                "pid" => 1573695284631,
                "children" => [
                    [
                        "id" => 1573695328137,
                        "name" => "3 Series",
                        "pid" => 1573695305619
                    ],
                    [
                        "id" => 1573695335102,
                        "name" => "X5",
                        "pid" => 1573695305619
                    ]
                ]
            ]
        ]
    ],
    [
        "id" => 1573695348647,
        "name" => "Motorcycles",
        "pid" => 0,
        "children" => [
            [
                "id" => 1573695355619,
                "name" => "Ducatti",
                "pid" => 1573695348647
            ]
        ]
    ]
];

var_dump(getParentNodes($tree, 1573695335102));

function getParentNodes($haystack, $child_node_id) {
    foreach ($haystack as $element) {
        if ($element['id'] === $child_node_id) {
            // return [$element['id']]; // uncomment if you want to include child itself
            return [];
        } else if (array_key_exists('children', $element)) {
            $parentNodes = getParentNodes($element['children'], $child_node_id);
            
            if ($parentNodes !== false) {
                return [$element['id'], ...$parentNodes];
            }
        }
    }
    
    return false;
}

Output for git.master, git.master_jit, rfc.property-hooks: array(2) { [0]=> int(1573695284631) [1]=> int(1573695305619) }

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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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