Why does telegram bot give multiple response when clicking on inlinekeyboard?

Question

PHP

When you click on the inline keyboard button, the bot displays many messages instead of one
How to overcome this?

Here is my code

$bot->on(function($update) use ($bot, $callback_loc, $find_command){
    $callback = $update->getCallbackQuery();
    $message = $callback->getMessage();
    $chatId = $message->getChat()->getId();
    $data = $callback->getData();


    $bot->sendMessage($chatId, "Вы выбрали $data\n");
}, function($update){
    $callback = $update->getCallbackQuery();
    if (is_null($callback) || !strlen($callback->getData()))
        return false;
    return true;
});