CODEWITHSUNDEEP
phpregexformsvalidationpreg-match
svsdnb
svsdnb

Reputation: 154

Form Validation to Allow 6 or 9 numbers Only?

I have a form with a field that accepts numbers only for an access code. Access codes are either 6 or 9 numbers. Currently I'm validating the field with 

elseif (( ! is_numeric($values['access'])) || ! preg_match('/[0-9]{6,9}$/', $values['access']))

which allows between 6 and 9 numbers. How can I allow only 6 or 9 numbers?

I'm guess it's something like 

elseif (( ! is_numeric($values['access'])) || ! preg_match('/[0-9]{6}[0-9]{9}$/', $values['access']))

But we all know that wont work. Can someone point me in the right direction?

Upvotes: 0

Views: 574

Answers (2)

Toto
Toto

Reputation: 91488

More efficient way, it takes 27 steps (accepted answer 36 steps):

  ^\d{6}(?:\d{3})?$

Demo & explanation

Upvotes: 1

delboy1978uk
delboy1978uk

Reputation: 12375

(a|b) will match either a or b. So!

^(\d{6}|\d{9})$

Will match either 6 numerals, or 9 numerals.

Which you can put to the test here https://regex101.com/r/Chx10H/1/

Upvotes: 2

Related Questions