Grab registration data from telegram bot - php

Question

I'm trying to create a Telegram API bot for clients registration , so I chose the ' setWebHook ' method and wrote some codes :
<?php
include("config.php");
$content = file_get_contents("php://input");
$update = json_decode($content, true);
$user_id = $update["message"]["chat"]["id"];
if( $update["message"]["text"] == "/start" OR $update["message"]["text"] == "/menu" ){
$keyboard = array(
'keyboard' => array(
array("📝 Register","🔑 Login")
),'one_time_keyboard'=>true,'resize_keyboard'=>true);
$replyKeyboard = json_encode($keyboard);
$replyMessage = "Hello 😊
Welcome to our bot ✋🏼
What do you want to do ?
.
";
}
if( $update["message"]["text"] == "📝 Register"){
$replyMessage = "Please enter username :";
}
$url = $bot_url.'sendMessage';
$data = array('chat_id' => $user_id,'text' => $replyMessage,'parse_mode' => 'Markdown','reply_markup' => $replyKeyboard );
$options = array(
'http' => array(
'header' => "Content-type: application/x-www-form-urlencoded\r\n",
'method' => 'POST',
'content' => http_build_query($data),
)
);
$context = stream_context_create($options);
$update = #file_get_contents($url, false, $context);
?>
Ok so the robot shows the options for register or login , and when you choose register , it asks you username. It's ok up to here but ,
what I have to do for the rest of the registration process ??
How should I grab username and store it in database and after that grab password and store it and for other informations ?
I appreciate any logical ways for registering by telegram bots.
I wish I could completely describe my problem , I need your help my friends.
Thank you
( config.php includes database and bot token information )

Answer 1

As I understand from your question these are some tips maybe helpful for you:
Each message that delivers from telegram (users) have an id that tell which user sends the message(==chat_id a unique number).
Your bot should log messages and save the important parts of messages in a db. In this manner you have a track of user's conversation with your bot and you can recognize that for which question of your bot ,user answers. If you look for each Json object delivers from telegram you can see which data telegram reveals from user.