Is it correct to receive updates from Webhook?

Question

PHP

Hello, I use the following construction to get updates:
$data = json_decode(file_get_contents('php://input'));
the handler code itself looks like this:
<?php
include 'functions.php';
$Token = '';
$name = 'ExamplE2019_bot';
$data = json_decode(file_get_contents('php://input'));
$chat_id = '';
$text = $data['message']['text'];
$url = ' https://api.telegram.org/bot '.$Token.'/';
switch($text)
{
case '/start':
sendMessage($url,$chat_id,'ok');
break;
}
As a result, when sending the '/start' message, the bot does not respond. If you comment out the switch part and leave the message sent when the code is called in the browser window, then everything works. Please help me find the problem with this code!

Answer 1

Try to see if updates come at all:
sendMessage($url,$chat_id, print_r($data, true));