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

Answer 1

To elaborate on leo pal's answer, an even more complete regex, which would accept even capital accented Greek characters, would be the following:

/^[α-ωΑ-ΩίϊΐόάέύϋΰήώΊΪΌΆΈΎΫΉΏ\s]+$/

With this, you get:

• α-ω - lowercase letters
• Α-Ω - uppercase letters
• ίϊΐόάέύϋΰήώ - lowercase letters with all (modern) diacritics
• ΊΪΌΆΈΎΫΉΏ - uppercase letters with all (modern) diacritics
• \s - any whitespace character

Note: The above does not take into account ancient Greek diacritics (ᾶ, ἀ, etc.).