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<?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));
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { ["first"]=> string(3) "foo" ["second"]=> NULL ["third"]=> NULL ["fourth"]=> string(3) "bar" }

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