Hello, I am trying to use zadarma webhook, but I have problem with the set-up.
I suspect that the problem is about data validation.
Zadarma says this:
In order for the system to accept your request, please add the verification code at the beginning of the script.
PHP example:
<?php if (isset($_GET['zd_echo'])) exit($_GET['zd_echo']); ?>
How can I set up this webhook properly?
this is zadarma api guide:
Thanks!