PHP telegram bot, sendmessage webhook - php

Question

I'm writing a telegram robot,
This is my code and I want the user receive the message which they send into the bot:
telegram.php :
<?php
class telegram {
public $token;
public function __construct($token)
{
$this->token = $token;
}
public function recievedText()
{
$text= json_decode(file_get_contents('php://input'),true);
return $text;
}
public function sendMessage($userid,$text)
{
$url='https://api.telegram.org/bot'.$this->token.'/sendMessage?chat_id='.$userid.'&text='.$text;
file_get_contents($url) ;
}
}
?>
index.php :
<?php
require ('config.php');
require('telegram.php');
$telegram = new telegram(TOKEN);
$result = $telegram->recievedText();
$userid = $result->message->from->id;
$text = $result->message->text;
$telegram->sendMessage($userid,$text) ;
?>
config.php :
<?php
define('TOKEN','----');
?>
and I have already set webhook and checked the SSL of my site via this and it was set,
I don't know where is the problem that when I send the message to the bot it doesn't send back any message!

Answer 1

You checked if you have ssl, but you don't check if you really use it. You also don't check what is the response from the request you do
file_get_contents($url) ;
change this line to:
$requestResponse = file_get_contents($url);
var_dump($http_response_header);
var_dump($requestResponse);
to see if you succeed sending the request at first.
Without the response It's just guessing what could go wrong.
You should see response code = 200 if everything is OK if other number not beginning with 2xx then you fail sending the requrest.
Read about HTTPS connections with file_get_contents(), or try to use cURL. Hint: Just for the debugging you can skip SSL verification so at least this problem at the beginning is eliminated. But remember to turn the verification back on after debugging!
If you do the request as GET query you need to encode the text before putting it at the url - use: urlencode() for that.
$url='https://api.telegram.org/bot'.$this->token.'/sendMessage?chat_id='.$userid.'&text='.$text;
change to
$url='https://api.telegram.org/bot'.$this->token.'/sendMessage?chat_id='. urlencode($userid) . '&text='.urlencode($text);
or even better make use of http_build_query() and encode this way all variable besides $this->token. Given link has a plain example so I'll skip giving you code.

Answer 2

You need to set webhook before anything else. Fire a POST request using Postman to
https://api.telegram.org/bot/setWebhook
with Body parameter:
url: https://your-server/api-endpoint
drop_pending_updates : true (false) -> (optional) I use this to drop pending messages