Online PHP editor | output 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 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: array(2) { [0]=> int(1573695284631) [1]=> int(1573695305619) }
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
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(2) { [0]=> int(1573695284631) [1]=> int(1573695305619) }
Output for 7.3.0 - 7.3.33: Parse error: syntax error, unexpected '...' (T_ELLIPSIS), expecting ']' in /in/umhv9 on line 58
Process exited with code 255.

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