hook not working

[ahegazy]

Hello ,

I'm trying to automate the process of splitting an invoice as when user has two or more products they all automatically combined together in one invoice but i wanna split them

so i decided to create a hook that listens for invoice creation and split the invoice using internal API

 

After reading the documentation i created the hook placed it in 'includes/hooks'

and created an invoice but nothing happens

i even tried to check whether the script is called or not by putting 'file_put_contents()' in to of it but i got nothing

 

function chk_invoices($vars) {

   $source = $vars['source']; //api, adminarea, clientarea, autogen
   $user = $vars['user']; //The Admin ID or "system" if via cron.
   $invoiceid = $vars['invoiceid']; //The ID of the invoice that has been created

   $command = "getinvoice";
   $adminuser = "admin";
   $values["invoiceid"] = $invoiceid;

   $results = localAPI($command,$values,$adminuser);

   splitInv($results);
}

add_hook("InvoiceCreation",1,"chk_invoices");