* * @pure */ function split(string $string, string $delimiter, ?int $limit = null): array { if ('' === $delimiter) { if (null === $limit || $limit >= length($string)) { return chunk($string); } if (1 === $limit) { return [$string]; } $length = $limit - 1; $result = chunk(slice($string, 0, $length)); $result[] = slice($string, $length); return $result; } if (null === $limit) { /** @var list */ return explode($delimiter, $string); } /** @var list */ return explode($delimiter, $string, $limit); }