Execute batch of transactions using cake 3 transactions issue

Need Help
1

Hi there,

I am using cake 3 transaction method to save data.
$conn->transactional(function ($conn) {

                       $stmt = $conn->newQuery()
                       ->insert(['email_id','name','address'])
                       ->into('users')
                       ->values($email_id,$name,$address)
                       ->execute();

I have declared the variables but while I am running this method .
It is saying undefined variable . This is causing error.

Kindly help me on this