form action=“?login” : What does the question mark mean?

Question

     Login with Google 

I usually see the action refer to a

Answer 1

a question mark denotes the query string. It will post to the current url with a query string parameter of login. I am not sure how you are processing the request after you click submit(post the form) but usually it would have a value assigned to it as in login=value

Answer 2

It means:

http://whatever/the-current-page-url-is?login (where "login" is the query string).

It is a relative-URI notation, similar to <img src="foo.jpg"> -- note the rest of the URI was not specified explicitly.

Happy coding