Just looking for guide to understand query strings

[Paul N. Pace]

My logs have been inundated with hits at example.com/?anything, though in
the actual logs 'anything' is a very long string of characters.

Log entry:

"GET /?anything HTTP/1.1" 200 581 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64;
Trident/7.0; rv:11.0) like Gecko"

(note there is no location for 'anything')

I didn't even know this was possible. I'm still not sure what nginx is
doing when it processes this request. If someone could help me out, even
just point me to a good explanation of what is happening, that would be
great.
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