如何缩短laravel重复路线？

Question

How to shorten this laravel route, I am trying to avoid to write code multiple times for one route.

Route::group(['domain' => 'maindomain.com'], function()
  {
      Route::get('/signup', function () {
        return view('app.signup');
      });
      Route::post('signup', 'UsersController@saveSignupStepOne');
      Route::get('/signup2', function () {
          return view('app.signup2');
      });
      Route::post('signup2', 'UsersController@saveSignupStepSecond');
});

Route::group(['domain' => 'subdomain.maindomain.com'], function()
  {
      Route::get('/signup', function () {
        return view('app.signup');
      });
      Route::post('signup', 'UsersController@saveSignupStepOne');

      Route::get('/signup3', function () {
          return view('app.signup3');
      });
      Route::post('signup3', 'UsersController@saveSignupStepThird');
});

Where common code is

Route::get('/signup', function () {
  return view('app.signup');
});
Route::post('signup', 'UsersController@saveSignupStepOne');

I have made like below code but how to use in above route ?

$commonRoute = function(){
    Route::get('/signup', function () {
      return view('app.signup');
    });
    Route::post('signup', 'UsersController@saveSignupStepOne');  
}

Answer 1

Place common routes outside a domain route group

Route::group(['domain' => 'maindomain.com'], function() {
  Route::get('/signup2', function () {
      return view('app.signup2');
  });

  Route::post('signup2', 'UsersController@saveSignupStepSecond');
});

Route::group(['domain' => 'subdomain.maindomain.com'], function() {
  Route::get('/signup3', function () {
      return view('app.signup3');
  });
  Route::post('signup3', 'UsersController@saveSignupStepThird');
});

Route::get('/signup', function () {
    return view('app.signup');
});

Route::post('signup', 'UsersController@saveSignupStepOne');

Or place common routes in another file named perhaps, common.php

Route::group(['domain' => 'subdomain.maindomain.com'], function() {
  include(__DIR__.'/common.php');
});