Php 如何在Laravel中使用数据库进行邮件设置

我想让用户远离编辑配置文件，所以我在管理面板中创建了用于设置邮件服务器、用户名、密码、端口、加密的web界面。。 我在Laravel 4.2中工作得很好，但现在当应用程序被重写为Laravel 5时，出现了一个错误：

Class 'Settings' not found in <b>F:\htdocs\app\config\mail.php</b> on line <b>18</b><br />

---

config/app.php：

'providers' => [

    ...

    'App\Providers\SettingsServiceProvider',

    ...

'aliases' => [

    ...

    'Settings' => 'App\Custom\Facades\Settings',

---

---

要存档此文件，我通过扩展
illighte\Mail\MailServiceProvider
创建了
CustomMailServiceProvider
，以覆盖此方法：

protected function registerSwiftTransport(){
    $this->app['swift.transport'] = $this->app->share(function($app)
    {
    return new TransportManager($app);
    });
}

这是完整的解决方案

我在app\Providers中创建了CustomMailServiceProvider.php

我在app/customs目录中创建了CustomTransportManager.php-
注意：默认的laravel 5目录结构中不存在app/customs目录，是我创建的

最后，我用
'app\Providers\CustomMailServiceProvider'，
我补充说

$this->app['config']['services'] = [
        'mailgun' => [
            'domain' => $settings->mailgun_domain,
            'secret' => $settings->mailgun_secret,
        ]
        ];   

要自定义TransportManager uu construct（）以包含我用作邮件服务的mailgun API凭据，自Laravel 5.4以来已删除了方法share（）。我不得不用其他方法来解决这个问题，我不确定它们是否完美。这是CustomMailServiceProvider类中的RegisterSwitTransport（）方法

首先，我们需要确定在通过命令行调用app时是否没有执行代码：“if（strpos（php_sapi_name（），'cli'）==false）”。在这种情况下，若我们不进行检查，并且不阻止设置新参数，Artisan将在命令行中抛出错误。其次，我们需要以某种方式从数据库中获取设置。我使用getSettingValue（）方法实现了这一点，其中第一个参数是设置键，如果找不到设置，第二个参数是默认值。如您所见，我为$this->app['config']['mail']分配了设置。
之后，我使用singleton（）方法：

我如前所述进行了配置，但是出现了以下错误。当我尝试您的代码时，发现Laravel5.4中的共享方法已被弃用，并被告知使用singleton

调用未定义的方法\Foundation\Application:：share（）

下面是使用singleton而不是share方法的以下方法：

protected function registerSwiftTransport(){
    $this->app->singleton('swift.transport', function ($app){
        return new CustomTransportManager($app);
    });
}

我正在考虑通过Illumb\Mail\TransportManager扩展邮件的选项，正在处理它，等待您的响应。我的回答有用吗？
<?php

namespace App\Custom\Facades;

use Illuminate\Support\Facades\Facade;

class Settings extends Facade {

    protected static function getFacadeAccessor() { return 'settings'; }

}

protected function registerSwiftTransport(){
    $this->app['swift.transport'] = $this->app->share(function($app)
    {
    return new TransportManager($app);
    });
}

namespace App\Providers;

use Illuminate\Mail\MailServiceProvider;
use App\Customs\CustomTransportManager;

class CustomMailServiceProvider extends MailServiceProvider{

    protected function registerSwiftTransport(){
        $this->app['swift.transport'] = $this->app->share(function($app)
        {
            return new CustomTransportManager($app);
        });
    }
}

namespace App\Customs;

use Illuminate\Mail\TransportManager;
use App\Models\Setting; //my models are located in app\models

class CustomTransportManager extends TransportManager {

    /**
     * Create a new manager instance.
     *
     * @param  \Illuminate\Foundation\Application  $app
     * @return void
     */
    public function __construct($app)
    {
        $this->app = $app;

        if( $settings = Setting::all() ){

            $this->app['config']['mail'] = [
                'driver'        => $settings->mail_driver,
                'host'          => $settings->mail_host,
                'port'          => $settings->mail_port,
                'from'          => [
                'address'   => $settings->mail_from_address,
                'name'      => $settings->mail_from_name
                ],
                'encryption'    => $settings->mail_encryption,
                'username'      => $settings->mail_username,
                'password'      => $settings->mail_password,
                'sendmail'      => $settings->mail_sendmail,
                'pretend'       => $settings->mail_pretend
           ];
       }

    }
}

$this->app['config']['services'] = [
        'mailgun' => [
            'domain' => $settings->mailgun_domain,
            'secret' => $settings->mailgun_secret,
        ]
        ];   

protected function registerSwiftTransport(){
    if (strpos(php_sapi_name(), 'cli') === false) {
       $this->app['config']['mail'] = [
        'driver'        => Setting::getSettingValue('mail_driver', '****'),
        'host'          => Setting::getSettingValue('mail_host', '****'),
        'port'          => Setting::getSettingValue('mail_port', 25),
        'from'          => [
            'address'   => Setting::getSettingValue('mail_from_address', '****'),
            'name'      => Setting::getSettingValue('mail_from_name', '****'),
        ],
        'encryption'    => Setting::getSettingValue('mail_encryption', '***'),
        'username'      => Setting::getSettingValue('mail_username', '****'),
        'password'      => Setting::getSettingValue('mail_password', '****'),
     ];
   }

   $this->app->singleton('swift.transport', function ($app) { 
       return new Illuminate\Mail\TransportManager($app);
   });
}

protected function registerSwiftTransport(){
    $this->app->singleton('swift.transport', function ($app){
        return new CustomTransportManager($app);
    });
}