Get matched route before execution in Laravel 4 - php

Question

I need to intercept a route so that I can grab one of its parameters, and use that parameter to query a cache at the onset of the page request. I have two questions:
Is there a "matched" event I can listen for?
Is there a way in Laravel to check if a route parameter key exists/isset, or simply get all parameters from the route?
EDIT: Note that the Route::matched() or Event::listen('router.matched') feature requires 4.1.19 or later, earlier versions will not contain these features.

Answer 1

Yes, you can use something like this:
Event::listen('router.matched', function($route) {
$username = $route->getParameter('username');
if($username && $username == 'heera') {
// do something
}
});
For example, I've a route like Route::get('/user/{username}', 'UserController#show') and the url for this route would be something like http://blog.dev/user/heera so, in the matched event listener I'll get username parameter using $route->getParameter('username') and if it's heera then do something, otherwise do nothing. The $route variable is an instance of Illuminate\Routing\Route and you can use all the public methods of this object.
BTW, you may put it in your filters.php file.
Update: It's also possible to register an event for router.matched event using this:
Route::matched(function($route) {
// Do something
});
Or this:
$app['router']->matched(function($route) {
// do something
});
Tested on Laravel Framework version 4.1.19.