Eccube\Controller\Install\InstallController::createMailYamlFile PHP Метод

    private function createMailYamlFile($data)
    {
        $fs = new Filesystem();
        $config_file = $this->config_path . '/mail.yml';
        if ($fs->exists($config_file)) {
            $fs->remove($config_file);
        }
        $target = array('${MAIL_BACKEND}', '${MAIL_HOST}', '${MAIL_PORT}', '${MAIL_USER}', '${MAIL_PASS}');
        $replace = array($data['mail_backend'], $data['smtp_host'], $data['smtp_port'], $data['smtp_username'], $data['smtp_password']);
        $fs = new Filesystem();
        $content = str_replace($target, $replace, file_get_contents($this->dist_path . '/mail.yml.dist'));
        $fs->dumpFile($config_file, $content);
        return $this;
    }