问将产品自定义字段中的收件人添加到Woocommerce新订单电子邮件通知

EN

add_filter( 'woocommerce_email_recipient_new_order', 'add_item_email_to_recipient', 10, 2 );
function add_item_email_to_recipient( $recipient, $order ) {
    if( is_admin() ) return $recipient;

    $emails = array();

    // Loop though  Order IDs
    foreach( $order->get_items() as $item_id => $item ){
        // Get the student email
        $email = get_field( 'product_email', $item->get_product_id() );
        if( ! empty($email) )
            $emails[] = $email; // Add email to the array
    }

    // If any student email exist we add it
    if( count($emails) > 0 ){
        // Remove duplicates (if there is any)
        $emails = array_unique($emails);
        // Add the emails to existing recipients
        $recipient .= ',' . implode( ',', $emails );
    }
    return $recipient;
}