voku / portable-utf8

      }

      // the offset

      if (\is_array($offset) === true) {

        $offset = \array_slice($offset, 0, $num);

        foreach ($offset as &$valueTmp) {

          $valueTmp = (int)$valueTmp === $valueTmp ? $valueTmp : 0;

        }

        unset($valueTmp);

      } else {

        $offset = \array_pad([$offset], $num, $offset);

      }

      // the length

      if (null === $length) {

      // the length

      if (null === $length) {

        $length = \array_fill(0, $num, 0);

      } elseif (\is_array($length) === true) {

        $length = \array_slice($length, 0, $num);

        foreach ($length as &$valueTmpV2) {

          if (null !== $valueTmpV2) {

            $valueTmpV2 = (int)$valueTmpV2 === $valueTmpV2 ? $valueTmpV2 : $num;

          } else {

            $valueTmpV2 = 0;

          }

        }

        unset($valueTmpV2);

      } else {

        $length = \array_pad([$length], $num, $length);

      }