How to deal with Polish Characters while using regex?

Question

I have street name as KRZYWOŃ ANIELI and so what should be my regex to allow this kind of expression. Currently I have simple one which uses /^[a-zA-Z ]+$/

Kindly advise.

Answer 1

Use /^[\s\p{L}]+$/u (PHP syntax).

Edit: Adjusted regex to better handle whitespace.