html - PHP different email submission id for different region -

i using html form php mail function embedded. have 3 region in form dropdown. if selects first region form submission should go 1 mail id, if selects second region should go different email id. please tell me how code in php single form.

thanks in advance.

define array region-emails -

$emails = array('first' => 'first@region.com', 'second' => 'second@region.com', 'third' => 'third@region.com'); 

get email -

$email = $email[$_post['region']]; 

add checks need.