Hook to modify invoice description

[consul]

Dear all,

I'm trying to write a hook to change the description field of tblinvoiceitems table:

 

<?php

use Illuminate\Database\Capsule\Manager as Capsule; 

add_hook("InvoiceCreationPreEmail", 1, function($vars) {

   $invoiceid = $vars['invoiceid'];

//get invoice line items from DB
   $result = Capsule::table('tblinvoiceitems')->where([
   ['invoiceid', '=', $invoiceid],
   ['type', 'like', 'Domain%'],
   ])->get();
   $itemid = $result[0]->id;
   $clientid = $result[0]->userid;
   $description = $result[0]->description;
   $domainid = $result[0]->relid;

   foreach ($itemid as $itemid) {
       Capsule::table('tblinvoiceitems')->where('id',$itemid)->update("description" => $description ." - ". $domainid);
   }

});

 

 

But it's return this error:

 

Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW) in /includes/hooks/invoicedescriptionedit.php on line 20

 

Please, you can help me to understand the error?

 

Thank you!