TicketOpen Hook - How to prevent / stop creating an ticket

[ZeroMB]

I am using the code below for the TicketOpen hook, but it fails to prevent WHMCS from creating a ticket.

// Check if the response is uniqueword and stop generating an ticket
if (trim($response) === 'uniqueword') {
    // Log the activity
    logActivity('Sorry no uniqueword');
    
    // Set message to an empty string to prevent ticket opening
    $vars['message'] = '';

    // Return a message to stop further processing
    return 'You are not allowed to open a ticket';
}

 

Only the die() statement works to prevent users from creating a ticket.

I even tried setting the message field to an empty string so WHMCS would throw an error, but nothing happened. Any solutions?

 

I only want to show an error when registered/unregistered user creating an ticket. Eg: If unique-word = true, stop creating an ticket and show error on ticket page.

Edited September 8 by ZeroMB

[DennisHermannsen]

You need to use TicketOpenValidation: https://developers.whmcs.com/hooks-reference/ticket/#ticketopenvalidation

TicketOpen doesn't accept any returns.