code: public function sendMessage(
          $chatId,
          $text,
          $disableWebPagePreview = null,
          $replyToMessageId = null,
          $replyMarkup = null
      ) {
          $response = $this->apiRequest("sendMessage", [
              "chat_id" => $chatId,
              "text" => $text,
              "disable_web_page_preview" => $disableWebPagePreview,
              "reply_to_message_id" => $replyToMessageId,
              "reply_markup" => $replyMarkup ? $replyMarkup->toArray() : null,
          ]);
          return $this->entityFromBody($response->getBody(), new Message());
      }
docs: Send a message
  
  @param int $chatId
  @param string $text
  @param bool|null $disableWebPagePreview
  @param int|null $replyToMessageId
  @param ReplyKeyboardMarkup|ReplyKeyboardHide|ForceReply|null $replyMarkup
  @return Message