php - regular expression for French characters

Question

I need a function or a regular expression to validate strings which contain alpha characters (including French ones), minus sign (-), dot (.) and space (excluding everything else)

Thanks

Answer 1

/^[a-zàa?éèê?????ùü???? .-]*$/i

Use of /i for case-insensitivity to make things simpler. If you don't want to allow empty strings, change * to +.