Online PHP editor | refs for oCJUV

<?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;