<?php $array = [ 7 => [49 => null, 41 => null], 8 => [70 => null, 69 => null], 105 => null, 9 => null, 10 => null ]; array_walk_recursive($array, fn(&$v, $k) => $v = $k); var_export($array);
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Value for `_results` contains invalid data `array`