Check if telegram is getting data of link (user-agent is telegram)

Question

I have a website which user has to be logged in to his/her account to view pages ... but I want to set meta tags (description, image and title) for only when someone shares the link on telegram ...

how should I do it ? thanks in advance.

Answer 1

So. I'v found the answer by using server.com/test.php with contents:

file_put_contents("heh.txt", $_SERVER['HTTP_USER_AGENT']);

Then I gave the link to telegram inside a chat. the content of heh.txt was:

TelegramBot (like TwitterBot)

so you should use:

if($_SERVER['HTTP_USER_AGENT'] === "TelegramBot (like TwitterBot)"){
  //do something
}