How to register a custom 404 in Laravel 5

Just add it in app/Http/Kernel.php :

public function handle($request)
{
    try
    {
        return parent::handle($request);
    }
    catch(\Symfony\Component\HttpKernel\Exception\NotFoundHttpException $e)
    {
        return response()->view('my.missing', [], 404);
    }
    catch (Exception $e)
    {
        $this->reportException($e);

        return $this->renderException($request, $e);
    }
}

You can also add the report of the exception if you want to get it in log.

Here is also a good example, taken from the "Easy Laravel 5" book https://github.com/wjgilmore/todoparrot/blob/master/app/Exceptions/Handler.php

This info is now obsolete because you just have to create a resources/views/errors/404.blade.php.

Do you mean my reply? That's interesting, so just add in a 404.blade.php in views/errors and it will handle it automatically you mean?

Yea Laravel will handle it for you ;) And out of my head you will have access to $code, $message, $headers

Hmm...Not sure how to display the optional message inside a custom error-blade-template...

{{ $message }}

will result into a 'undefined variable' error.

Just wanted to add that, for 404 errors, in the nginx configuration (/etc/nginx/sites-enabled/yoursite.app) you should delete or comment out the line that says: 'error_page 404 /index.php;' as per @roadkill247's suggestion in another thread (https://laracasts.com/discuss/channels/general-discussion/homestead-rewritepretty-urls-404). Otherwise you'll keep getting the default nginx 404 page.