Question:
In the article "PHP: a fractal of bad design" on Habré, I opened a link and on the opened page opened another link PHP Credits .
Then I tried a similar one ( ?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000 ) on familiar sites, it was displayed, but not at all, which means there is a solution.
After a little googling, I found the answer, set expose_php = Off in php.ini settings.
The topic is not a question, but maybe the information is useful to someone.
Answer:
These "eggs" will only say that the application is written in pkhp. Well, what modules. This is such useless crap that if you check the logs of some old site, you will not see such requests to the server.