Telegram Bot PHP won't work (Running Apache on Xampp) - php

Question

I am building a bot for Telegram that basically the user will be able to run a command and it will return some text. I am running Apache servers on Xampp. I already tested capturing some Arrays from user and I can capture it.
Not sure if maybe I have to run it on SSL Web Servers? or is there a function that I can use instead with Apache?
<?php
ini_set('error_reporting', E_ALL);
$botToken = "";
$website = "https://api.telegram.org/bot".$botToken;
$update = file_get_contents('php://input');
$update = json_decode($update, TRUE);
$chatId = $update["message"]["chat"]["id"];
$message = $update["message"]["text"];
switch($message) {
case "/test":
sendMessage($chatId, "test");
break;
case "/hi":
sendMessage($chatId, "hey there!");
break;
default:
sendMessage($chatId, "default");
}
function sendMessage ($chatId, $message) {
$url = $GLOBALS[website]."/sendMessage? chat_id=".$chatId."&text=".urlencode($message);
file_get_contents($url);
}
?>
These are the errors I get:
Notice: Use of undefined constant website - assumed 'website' in C:\xampp\htdocs\Socializers_bot\index.php on line 29
Warning: file_get_contents(https://api.telegram.org/bot/sendMessage?chat_id=&text=default): failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request in C:\xampp\htdocs\Socializers_bot\index.php on line 30