在Laravel中back（）不为null时重定向

Question

When I dd(back()) it shows all inside back() and one of its key is _previous which I want to use.

My code:

if($request->session()->attributes['_previous'] !== NULL)
// go back
else
// go to specific page

My problem:

The attributes is protected and I couldn't use _previous to go back if it's not null. Is there any suggestion I can use or some other approaches?

Appreciation

Answer 1

I'd just use back(), because I can't see any scenario when you want to redirect and have NULL back() at the same time.

If you want to check referrer, you can you something like this:

if($_SERVER['HTTP_REFERER']){
    Redirect::back();
}else{
    Redirect::route('main.page');
}

BTW, if you want to check something for NULL (not just false), you should use is_null function: https://secure.php.net/manual/ru/function.is-null.php