Sends a request locally, but not on the Internet?

Question

PHP

Sends an application on the local, but not on the Internet.
Error appears on the Internet, everything is fine on the local, why?
Help! Very necessary! Thanks in advance!

<?php

$name = $_POST['fio'];
$phone = $_POST['phone'];
$token = "630683258:AAF18XQlE2SFVid3y4P7yGvqJxMFvyjQUM4";
$chat_id = "-361496163";
$arr = array(
  'Ф.И.О.: ' => $name,
  'Телефон: ' => $phone,
);

foreach($arr as $key => $value) {
  $txt .= "<b>".$key."</b> ".$value."%0A";
};

$sendToTelegram = fopen("https://api.telegram.org/bot{$token}/sendMessage?chat_id={$chat_id}&parse_mode=html&text={$txt}","r");

if ($sendToTelegram) {
  header('Location: thank-you.html');
} else {
  echo "Error";
}
?>

Answer 1

Check the PHP configuration on your server. Maybe the allow_url_fopen directive is disabled.
php.net/manual/ru/filesystem.configuration.php