Laravel 5.4前后台分离，通过不同的二级域名访问

第一步：添加app\http\Controllers文件夹里面创建我们要存放前端和后端或者接口的文件夹

列如： Home(前端)  Admin(后端)   App(接口)  文件夹

第二步：修改app\http\providers\RouteServiceProvider.php

<?phpnamespace App\Providers;use Illuminate\Support\Facades\Route;use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;class RouteServiceProvider extends ServiceProvider{    /**     * This namespace is applied to your controller routes.     *     * In addition, it is set as the URL generator's root namespace.     *     * @var string     */    protected $namespace = 'App\Http\Controllers';    protected $homeNamespace = 'App\Http\Controllers\Home';//PC端    protected $adminNamespace = 'App\Http\Controllers\Admin';//管理后台    /**     * Define your route model bindings, pattern filters, etc.     *     * @return void     */    public function boot()    {        //        parent::boot();    }    /**     * Define the routes for the application.     *     * @return void     */    public function map()    {        //$this->mapApiRoutes();        //$this->mapWebRoutes();        $sld_prefix = explode('.',$_SERVER['HTTP_HOST'])[0];        if(config('route.admin_url') == $sld_prefix){            $this->mapAdminRoutes();        }elseif(config('route.home_url') == $sld_prefix){            $this->mapHomeRoutes();        }elseif(config('route.api_url') == $sld_prefix){            $this->mapApiRoutes();        }    }    /**     * Define the "web" routes for the application.     *     * These routes all receive session state, CSRF protection, etc.     *     * @return void     */    protected function mapWebRoutes()    {        Route::middleware('web')             ->namespace($this->namespace)             ->group(base_path('routes/web.php'));    }    /**     * Define the "api" routes for the application.     *     * These routes are typically stateless.     *     * @return void     */    protected function mapApiRoutes()    {        Route::prefix('api')             ->middleware('api')             ->namespace($this->namespace)             ->group(base_path('routes/api.php'));    }    /**     * 管理后台     */    protected function mapAdminRoutes()    {        Route::middleware('web')            ->namespace($this->adminNamespace)            ->group(base_path('routes/admin.php'));    }    /**     * PC端     */    protected function mapHomeRoutes()    {        Route::middleware('web')            ->namespace($this->homeNamespace)            ->group(base_path('routes/home.php'));    }}

第三步：在routes目录下创建admin.php 和home.php 路由

第四步：分别在app\Http\Controllers\Admin和app\Http\Controllers\Home

<?phpnamespace App\Http\Controllers\Admin;use App\Http\Controllers\Controller;class AdminController extends Controller{    public function index()    {        echo "this is admin";    }}

<?phpnamespace App\Http\Controllers\Home;use App\Http\Controllers\Controller;class HomeController extends Controller{    public function index()    {        echo "this is home";    }}

第五步：分别在admin.php 和home.php 新建路由

Route::get('/', 'AdminController@index');

Route::get('/','HomeController@index');

第六步：测试

第七步：运行报错
错误一：laravel Class ‘App\Http\Controllers\Controller’ not found

错误二：Class App\Http\Controllers\IndexController does not exist

解决方法：

在PHPstorm Terminal控制台输入“composer dump-autoload”因为laravel是用composer来加载类，不是命令创建的类要更新autoload。

如果没有使用PHPstorm编辑器的话，我们需要在本地安装composer，然后cmd以管理员运行，进入到项目的根目录执行“composer dump-autoload”