Online PHP editor | output for uKi1A

@ 2023-01-18T22:35:13Z

<?php

$array = [
    2 => [
        'position' => 0,
        'children' => [
            3 => ['position' => "375"],
            5 => ['position' => "44"],
            6 => ['position' => "567"],
            9 => [
                'position' =>  "12",
                'children' => [
                    74 => ['position' => "2"],
                    76 => ['position' => "3"],
                    77 => ['position' => "1"],
                ]
            ],
            62 => ['position' => "34"],
            63 => ['position' => "11"],
            66 => ['position' => "114"],
            74 => ['position' => "912"],
            76 => ['position' => "4564"],
        ]
    ]
];


function recur(&$data): void
{
    uasort($data, fn($a, $b) => $a['position'] <=> $b['position']);
    foreach($data as &$value){
        if (isset($value['children'])) {
            recur($value['children']);
        }
    }
}
recur($array);
var_export($array);

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: array ( 2 => array ( 'position' => 0, 'children' => array ( 63 => array ( 'position' => '11', ), 9 => array ( 'position' => '12', 'children' => array ( 77 => array ( 'position' => '1', ), 74 => array ( 'position' => '2', ), 76 => array ( 'position' => '3', ), ), ), 62 => array ( 'position' => '34', ), 5 => array ( 'position' => '44', ), 66 => array ( 'position' => '114', ), 3 => array ( 'position' => '375', ), 6 => array ( 'position' => '567', ), 74 => array ( 'position' => '912', ), 76 => array ( 'position' => '4564', ), ), ), )
Output for 7.3.23 - 7.3.33: Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ')' in /in/uKi1A on line 30
Process exited with code 255.
Output for 7.2.34: Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ',' or ')' in /in/uKi1A on line 30
Process exited with code 255.

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