laravel 辅助函数url()和asset()区别
https://laravel-admin.org/docs/zh/1.x/installation
url('img/home1/')，生成的链接：http://localhost/img/home1/
url("/posts/{$post->age}",['post' => 1, 'comment' => 3]) 生成的链接： http://www.blog.com/posts/20/1/3
url('img/home1/','test')，生成的链接：http://localhost/img/home1/test
url('img/edit',['id'=>$v->id]) 生成的链接： http://www.blog.com/news/edit/56 而不是http://www.blog.com/news/edit？id=56
url('img/home1/','test',true)，生成的链接：https://localhost/img/home1/test
asset('img/home1/')，生成的链接：http://localhost/img/home1/
asset('img/home1/',true)，生成的链接：https://localhost/img/home1/
url()
通过url辅助函数（路由）生成：
location.href = "{{url('user/index')}}";
或者：location.href = "{{url::to('user/index')}}";
route()
通过别名（路由）生成，前提是在注册路由的时候要指定别名，例如：Route::get('user/index',['as' => 'user/index1', 'uses' => 'UserController@index']);
location.href = "{{route('user/index1')}}";
或者：location.href = "{{URL::route('user/index1')}}";
route('shitu_luyou',['post' => 1, 'comment' => 3]) http://www.blog.com/shitu?post=1&comment=3
action()
通过控制器、方法名生成（路由不要指定别名，否则会报错！）：
location.href = "{{action('UserController@index',['id'=>1,'author'=>'admin'])}}";
或者：location.href = "{{URL::action('UserController@index',['id'=>1,'author'=>'admin'])}}";