PHP and regexp to accept only Greek characters in form

Question

I need a regular expression that accepts only Greek chars and spaces for a name field in my form (PHP). I've tried several findings on the net but no luck. Any help will be appreciated.

Answer 1

Full letters solution, with accented letters:

/^[A-Za-zΑ-Ωα-ωίϊΐόάέύϋΰήώ]+$/

Answer 2

I'm not too current on the Greek alphabet, but if you wanted to do this with the Roman alphabet, you would do this:

/^[a-zA-Z\s]*$/

So to do this with Greek, you replace a and z with the first and last letters of the Greek alphabet. If I remember right, those are α and ω. So the code would be:

/^[α-ωΑ-Ω\s]*$/