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<?php function rcr(array $ids): array { $array = []; foreach ($ids as $id) { $array[$id] = rcr(getSubIds($id)); } return $array; } function getSubIds(int $id): array { switch ($id) { case 2: return [5, 108]; case 5: return [7]; case 7: return [46]; case 8: return [72]; default: return []; } } print_r(rcr([2, 14, 8]));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [2] => Array ( [5] => Array ( [7] => Array ( [46] => Array ( ) ) ) [108] => Array ( ) ) [14] => Array ( ) [8] => Array ( [72] => Array ( ) ) )

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