How in WooCommerce, when the buyer placed an order, the subject of the letter was the city, region?

Question

WordPress

I would like to set up sorting of letters, based on the city or region in the online store, so that when a new order arrives, the mail filters it and forwards it to couriers from a specific region.

It is necessary that the subject of the letter displays not only the order number, but also the region and city.
tell?)

Answer 1

Add your placeholder for the email and specify them in the email subject in the WooCommerce settings.

add_filter( 'woocommerce_email_format_string', 'fink_add_email_placeholders', 10, 2 );
function fink_add_email_placeholders( $string, $email ) {
    $order = $email->object;
    
    $placeholders = array(
        '{order_city}'      => $order->get_billing_city(), // Город заказа
        '{order_state}'   => $order->get_billing_state(), //Область заказа
    );

    return str_replace( array_keys( $placeholders ), array_values( $placeholders ), $string );
}