Regex for description form input

Question

a textarea is a part of my form. The user has to write a little text and I want to validate this text. For now I am using the following regex:

/^[0-9a-zA-ZäöüÄÖÜ_\-']+$/

Although I have mentioned the äöüÄÖÜ in the regex it handles all words with äöü.. as invalid. Furthermore it does not accept empty spaces.

Any ideas how to improve the regex?

Answer 1

Use a Unicode-aware regex:

/[\pL\pN_\-]+/