Dear Kyle, I see this information but I can't understand how to use it.
This is why I still believe that a supporting article would be very helpful.
I'll try to make my question more precise.
Createdir.php is simplest predefined script to create a directory
*************
<?php
$dirPath = "/var/www/vhosts/example.com/HELLOCB";
$result = mkdir($dirPath, 0755);
?>
**************
So when I put the path
example.com/createdir.php
to browser - I know the script works and creates directory HELLOCB.
OK, now I choose under CBSUBS - Plans - Integrations - URL - First Subscription Activation - enter same path -
example.com/createdir.php
CBSUBS interface requires me to choose from three variants
Get
Post
XML
Which one should I choose to execute this PHP script once ?