How can I use special characters in PHP in the shell?

For school we are forced to write a small program in BASIC or "any other language", so I will do it in PHP.

I need to run it through the command line, so I thought I'd make some improvements to the shell "UI" with lines, etc. I used ALT + nnn to paste them into my code, but when I execute it in the shell I get weird characters at this point.

Does anyone know how to fix this?

thank