What does the bag exactly mean?

Question

I am not sure whether it is a topic or concept in the whole web development context, but when it comes to Laravel, the Php framework, I faced with this word (bag, or error bag) number of times, but I did not understand what does it exactly mean. Can anyone explain it? Thanks...

Answer 1

accord to laravel document:

If you have multiple forms on a single page, you may wish to name the MessageBag containing the validation errors, allowing you to retrieve the error messages for a specific form. To achieve this, pass a name as the second argument to withErrors:

return redirect('register')->withErrors($validator, 'login');

You may then access the named MessageBag instance from the $errors variable:

{{ $errors->login->first('email') }}