Woocommerce - Need to send email to specific address based on zip code

Question

Basically, in woocommerce you have the option to input multiple email addresses (separated by commas) of who to send the completed order to, in WooCommerce -> Settings -> Em

Answer 1

I had a bit of trouble with helgatheviking's answer above and also a slightly different use case. My problems/needs were:

• I didn't quite understand the filter name as presented above.
• The public function get_recipient() inside of class-wc-email.php expected a string but was getting an array.
• A also wanted to conditionally add the extra recipient based on the payment method, rather than postcode.

Here's what I did instead:

• Added full filter name, not just the suffix: woocommerce_email_recipient_new_order
• Replaced explode() and array_push() with string concatenation $email .= ',' . $additional_email;.
• Conditionally checked payment method: if( $order->get_payment_method() == "cod" ).

Full example:

add_filter( 'woocommerce_email_recipient_new_order' , 'so_26429482_add_recipient', 20, 2 );
function so_26429482_add_recipient( $email, $order ) {

    // !empty($order) prevents a fatal error in WooCommerce Settings
    // !empty($email) prevents the duplicate email from being sent in cases where the filter is run outside of when emails are normally sent. In my case, when using https://wordpress.org/plugins/woo-preview-emails/
    if(!empty($order) && !empty($email)) {
    
        $additional_email = "isf@domain.co";
    
        if( $order->get_payment_method() == "cod" ) {
            $email .= ',' . $additional_email;
        } else {
            $email .= ',another@domain.co';
        }
    
    }
    return $email;
}