Break URL in segments in laravel 5

For accessing previous url in laravel.I am using this code in my controller.

$current_url = Request::url();
$back_url = redirect()->back()->getTargetUrl();
if ($current_url != $back_url) {
  Session::put('previous_url', redirect()->back()->getTargetUrl());
}

This method helps maintainging previous url even when server side validation fails. In my blade i access previous url like this .

I need to find the segment segment of my previous url. Thanks

via Chebli Mohamed