laravel 5中Application URL的意义是什么

当用户访问您的网站时，Laravel会从PHP的superglobals($_服务器，$_GET，$_POST，等等)获取大量有关请求的信息.此信息的一部分是请求URL.

例如，如果访问请求方法url()或path()，则通过$_服务器superglobal检索此信息:

$url = Request::url();
$path = Request::path();

However, artisan, commands, jobs, etc. don't have the benefit of this information. It is not a normal HTTP request coming in from the user, it is a PHP command being run from the command line. Because of this, Laravel needs a way to determine what the url of the application should be. This is where the configuration value comes in.

In your example, you plan on sending out emails from a queue. Imagine you need to include a link to a route of your website in one of the emails, so you use the UrlGenerator to get the url for the link (URL::route('route.name')). Since this code is being run inside a command, and isn't related to any type of HTTP request, the base application url will be picked up from the configuration value you set in config/app.php.

As should hopefully be a little more clear now, the url value should be set to the http url for your application, not any type of directory path. In your example, it should be http://mydomainname.com.