GitHub: exec($_POST (github.com)

This is mostly a PSA reminding people not to do this sort of thing.

Also: https://github.com/search?q=exec%28%24_GET&type=Code&ref=sea...

etc.

Untrusted user input should not be -executed- in any context.

@throwaway2048 has already posted this with $_GET as parameter https://news.ycombinator.com/item?id=7665153