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@ 2020-10-05T10:42:52Z

<?php

$menu = [
    [
        'navigationMenuId' => '1',
        'subNavigationItems' => [],
    ],
    [
        'navigationMenuId' => '2', 
        'subNavigationItems' => [],
    ],
    [
        'navigationMenuId' => '3',
        'subNavigationItems' => [
            4 => [
                'navigationMenuId' => '4',
                'subNavigationItems' => [],
            ],
            5 => [
                'navigationMenuId' => '5',
                'subNavigationItems' => [],
            ],
            6 => [
                'navigationMenuId' => '6',
                'subNavigationItems' => [],
            ],
            7 => [
                'navigationMenuId' => '7',
                'subNavigationItems' => [],
            ],
        ],
    ],
    [
        'navigationMenuId' => '8',
        'subNavigationItems' => [],
    ],
    [
        'navigationMenuId' => '9',
        'subNavigationItems' => [
            10 => [
                'navigationMenuId' => '10',
                'subNavigationItems' => [],
            ],
            11 => [
                'navigationMenuId' => '11',
                'subNavigationItems' => [],
            ],
            12 => [
                'navigationMenuId' => '12',
                'subNavigationItems' => [],
            ],
        ],
    ],
    [
        'navigationMenuId' => '13',
        'subNavigationItems' => [],
    ],
];

function reindexChildren(array $array): array {
    foreach ($array as &$item) {
        if ($item['subNavigationItems']) {
            $item = reindexChildren($item['subNavigationItems']);
        }
    }
    return array_values($array);
}

var_export(
    reindexChildren($menu)
);

Output for git.master, git.master_jit, rfc.property-hooks: array ( 0 => array ( 'navigationMenuId' => '1', 'subNavigationItems' => array ( ), ), 1 => array ( 'navigationMenuId' => '2', 'subNavigationItems' => array ( ), ), 2 => array ( 0 => array ( 'navigationMenuId' => '4', 'subNavigationItems' => array ( ), ), 1 => array ( 'navigationMenuId' => '5', 'subNavigationItems' => array ( ), ), 2 => array ( 'navigationMenuId' => '6', 'subNavigationItems' => array ( ), ), 3 => array ( 'navigationMenuId' => '7', 'subNavigationItems' => array ( ), ), ), 3 => array ( 'navigationMenuId' => '8', 'subNavigationItems' => array ( ), ), 4 => array ( 0 => array ( 'navigationMenuId' => '10', 'subNavigationItems' => array ( ), ), 1 => array ( 'navigationMenuId' => '11', 'subNavigationItems' => array ( ), ), 2 => array ( 'navigationMenuId' => '12', 'subNavigationItems' => array ( ), ), ), 5 => array ( 'navigationMenuId' => '13', 'subNavigationItems' => array ( ), ), )

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Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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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