[like_any_other]

Invisible characters, lookalike characters, reversing text order attacks [1].. the only way to use unicode safely seems to be by whitelisting a small subset of it.

And please, everyone arguing the code snippet should never have passed review - do you honestly believe this is the only kind of attack that can exploit invisible characters?

[1] https://attack.mitre.org/techniques/T1036/002/