opencart 寄信功能

可參考檔案根目錄的 /catalog/model/checkout/order.php

它每次使用寄信功能，都是使用下面這一段：

                $mail = $this->factory->newMail();
                $mail->protocol = $this->config->get('config_mail_protocol');
                $mail->parameter = $this->config->get('config_mail_parameter');
                $mail->hostname = $this->config->get('config_smtp_host');
                $mail->username = $this->config->get('config_smtp_username');
                $mail->password = $this->config->get('config_smtp_password');
                $mail->port = $this->config->get('config_smtp_port');
                $mail->timeout = $this->config->get('config_smtp_timeout');
                $mail->setTo($order_info['email']);
                $mail->setFrom($this->config->get('config_email'));
                $mail->setSender($order_info['store_name']);
                $mail->setSubject(html_entity_decode($subject, ENT_QUOTES, 'UTF-8'));
                $mail->setHtml($html);
                $mail->setText(html_entity_decode($text, ENT_QUOTES, 'UTF-8'));
                $mail->send();

protocol, username, password 這些內容都已經預先設定好， 所以 $mail->timeout 以上那幾行，似乎應該不用每次都呼叫。但 opencart 就是每次都重寫。opencart 好多重複的程式碼~