html5 - How to send same php filled form to client also -

how send same php filled form client also?

like below code sent file website owner in html/php forms

$to = "owner@gmail.com"; 

now how add client here like

$to = "owner@gmail.com,$email"; 

or what?

use this

$field_email = "sender@mail.com"  $to = "owner@site.com, $feild_email "; $subject = "subject" $message = "message";  mail($to,$subject,$message);