$variants - is garbage. Forget to remove from code before submiting (

DO NOT SMILE IN COMMENTS :)

My problem was comment with smile in code.

PHP. I have 'Source code contains invalid string interpolation' error. But can't see any in my code...
Is't possible to get detail on error?

Idia for 4 kata in seria.
Analog signal on input :). And if it possible to read byte-by-byte stdin (or simulate it)

Nice kata :)
But the specifics of the testing system do not allow it to be fully revealed.
There is now way to read incoming data from stdin, so there is no reason to write code for several Tb-lenght text ))
(Unless you desied to force yourself read input string byte-to-byte - sort of simulation reading from stdin)

I'm not sure, but I think this code was, let me say, "stolen" )).
I'd like to understand how it works. Main message is 'Hello World!' and author just make strtolower(). I don't belive that this methods couldn't write 'h' and 'w' in lower case directly.
Thank you for showing this code. I should find out how it works.

Any ides where this code from?

Nice!