<?php

if (isset($update->message)) {
    $message    = $update->message;
    $text       = $message->text ?? null;
    $from_id    = $message->from->id ?? null;
    $chat_id    = $message->chat->id ?? null;
    $message_id = $message->message_id ?? null;
    $first_name = $message->from->first_name ?? null;
    $last_name  = $message->from->last_name ?? null;
    $username   = $message->from->username ?? null;
}

if (isset($update->callback_query)) {
    $callback_query = $update->callback_query;
    $data           = $callback_query->data ?? null;
    $from_id        = $callback_query->from->id ?? $from_id;
    $chat_id        = $callback_query->message->chat->id ?? $chat_id;
    $message_id     = $callback_query->message->message_id ?? $message_id;
    $first_name     = $callback_query->from->first_name ?? $first_name;
    $last_name      = $callback_query->from->last_name ?? $last_name;
    $username       = $callback_query->from->username ?? $username;
}