获取子域路由中的子域（Laravel）

Question

I'm building an application where a subdomain points to a user. How can I get the subdomain-part of the address elsewhere than in a route?

Route::group(array('domain' => '{subdomain}.project.dev'), function() {

    Route::get('foo', function($subdomain) {
        // Here I can access $subdomain
    });

    // How can I get $subdomain here?

});

I've built a messy work-around, though:

Route::bind('subdomain', function($subdomain) {

    // Use IoC to store the variable for use anywhere
    App::bindIf('subdomain', function($app) use($subdomain) {
        return $subdomain;
    });

    // We are technically replacing the subdomain-variable
    // However, we don't need to change it
    return $subdomain;

});

The reason I want to use the variable outside a route is to establish a database-connection based on that variable.

Answer 1

Shortly after this question was asked, Laravel implemented a new method for getting the subdomain inside the routing code. It can be used like this:

Route::group(array('domain' => '{subdomain}.project.dev'), function() {

    Route::get('foo', function($subdomain) {
        // Here I can access $subdomain
    });

    $subdomain = Route::input('subdomain');

});

See "Accessing A Route Parameter Value" in the docs .

Answer 2

$subdomain is injected in the actual Route callback, it is undefined inside the group closure because the Request has not been parsed yet.

I don't see why would you need to have it available inside the group closure BUT outside of the actual Route callback.

If want you want is to have it available everywhere ONCE the Request has been parsed, you could setup an after filter to store the $subdomain value:

Config::set('request.subdomain', Route::getCurrentRoute()->getParameter('subdomain'));

Update : applying a group filter to setup a database connection.

Route::filter('set_subdomain_db', function($route, $request)
{
    //set your $db here based on $route or $request information.
    //set it to a config for example, so it si available in all
    //the routes this filter is applied to
    Config::set('request.subdomain', 'subdomain_here');
    Config::set('request.db', 'db_conn_here');
});

Route::group(array(
        'domain' => '{subdomain}.project.dev',
        'before' => 'set_subdomain_db'
    ), function() {

    Route::get('foo', function() {
        Config::get('request.subdomain');
    });

    Route::get('bar', function() {
        Config::get('request.subdomain');
        Config::get('request.db');
    });
});

Answer 3

Above won't work in Laravel 5.4 or 5.6. Please test this one:

$subdomain = array_first(explode('.', request()->getHost()));

Answer 4

Way with macro:

Request::macro('subdomain', function () {
    return current(explode('.', $this->getHost()));
});

Now you can use it:

$request->subdomain();

Answer 5

in the route call

$route = Route::getCurrentRoute();

and now you should have access to everything the route has. Ie

$route = Route::getCurrentRoute();
$subdomain = $route->getParameter('subdomain');

Answer 6

像这样

Route::getCurrentRoute()->subdomain