<?php $array = [10, [[[]],[]], 'hello', [1, 2, 3, ['hi', 7]], [15, 67], 12]; function array_tally_recursive(array $array): int { $tally = 0; foreach ($array as $item) { if (is_array($item)) { $tally += 1 + array_tally_recursive($item); } } return $tally; } echo array_tally_recursive($array);
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