Regular expression to accept only greek characters

Question

I have this regular expression ^[A-Za-z]{2,3}[0-9]{3,4}$ with which I validate in an input field so that it has 2 or 3 letters and 3 or 4 numbers

I want to accept only greek characters.

I tried this ^[α-ωΑ-Ω]{2,3}[0-9]{3,4}$ from PHP and regexp to accept only Greek characters in form but with no luck

i also tried ^[\p{Greek}]{2,3}[0-9]{3,4}$ but again no luck

Any suggestions?

VALID STRINGS: ΚΚΞ542 OOP8888 ΠΠ8965 INVALID STRINGS: 555555 K879 ΓΗΥΟ565

Did you try it like [`'~^\p{Greek}{2,3}[0-9]{3,4}$~u'`](https://regex101.com/r/odQChv/1)? What are the example valid/invalid strings? — Wiktor Stribiżew, Dec 14 '17 at 13:20
It means that the field is always invalid even if it has 2 or 3 characters and 3 or 4 letters — dip, Dec 14 '17 at 13:21
@WiktorStribiżew it doesn' work. i've updated my answer with valid/invalid — dip, Dec 14 '17 at 13:24
How come `OOP8888` is valid? It has no Greek letters. And [the rest is working well](https://regex101.com/r/odQChv/2). — Wiktor Stribiżew, Dec 14 '17 at 13:29
Wait, they are shown as Latin in your post, and as Greek in the comment text. See https://regex101.com/r/odQChv/3 - it works as expected. — Wiktor Stribiżew, Dec 14 '17 at 13:31
Mind that when you copy/paste these chars, they might be re-interpreted as ASCII letters. If your input may contain Latin `O` and `P`, just add to a character class, `[\p{Greek}OP]` and use `i` modifier, too. — Wiktor Stribiżew, Dec 14 '17 at 13:36

score 4 · Accepted Answer · answered Dec 14 '17 at 13:33

4

You may match chars with \p{Greek} and you must use the /u modifier:

'~^\p{Greek}{2,3}[0-9]{3,4}$~u'

Pattern details

answered Dec 14 '17 at 13:33

Wiktor Stribiżew

1 Answers1