<?php function nullifyEmptyStrings(array $array) { return array_map(function ($item) { return $item !== '' ? $item : null; }, $array); } $row = [ 'first' => 'foo', 'second' => '', 'third' => '', 'fourth' => 'bar', ]; var_dump(nullifyEmptyStrings($row));
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Value for `_results` contains invalid data `array`