Online PHP editor | output for oCJUV

@ 2018-04-06T00:09:28Z

<?php

function setTier(array $nodes, $tier = 1)
{
    return array_map(function ($node) use ($tier) {
        $node->tier = $tier;
        $node->children = setTier($node->children, $tier + 1);

        return $node;
    }, $nodes);
}

$structure = json_decode('
    [{
        "name": "a",
        "children": [{
            "name": "c",
            "children": [{
                "name": "e",
                "children": [{
                    "name": "g",
                    "children": []
                }]
            }, {
                "name": "f",
                "children": []
            }]
        }, {
            "name": "d",
            "children": [{
                "name": "h",
                "children": []
            }]
        }]
    }, {
        "name": "b",
        "children": []
    }]
');

$structure = setTier($structure);

print_r($structure); die;

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13: Array ( [0] => stdClass Object ( [name] => a [children] => Array ( [0] => stdClass Object ( [name] => c [children] => Array ( [0] => stdClass Object ( [name] => e [children] => Array ( [0] => stdClass Object ( [name] => g [children] => Array ( ) [tier] => 4 ) ) [tier] => 3 ) [1] => stdClass Object ( [name] => f [children] => Array ( ) [tier] => 3 ) ) [tier] => 2 ) [1] => stdClass Object ( [name] => d [children] => Array ( [0] => stdClass Object ( [name] => h [children] => Array ( ) [tier] => 3 ) ) [tier] => 2 ) ) [tier] => 1 ) [1] => stdClass Object ( [name] => b [children] => Array ( ) [tier] => 1 ) )

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