How to make open and close using blade directive?

After seeing a blog (http://ift.tt/29hil9E) which explains about laravel blade directive, I feel it's very interesting and useful. But I feel stuck when I want make a blade directive that has open and close like bellow:

@onlyurl('404')
 Some texts here
@endonlyurl

Does laravel provide a way to do this? If yes, how can I make it?

via Chebli Mohamed