CODEWITHSUNDEEP
phpregex
dtx
dtx

Reputation: 340

Regular Expression for numbers and letters unless all digits are identical

I have an regular expression:

^(?!(?:(\d)\1+[ -]*)+$)\d[\d- ]+$

Demo: http://regex101.com/r/sB1tK3/1

As you can see it not allowing strings which have all characters identical, but it checks only numbers.

How would I make that same regex checks letters (dashes and spaces shoud be still allowed) e.g:

aaaaa - it's not ok

aa-aaa-aaa-aaaaa - it's not OK

ababab - it's OK

ab-ab-ab - it's OK

Regards

Upvotes: 1

Views: 33

Answers (1)

anubhava
anubhava

Reputation: 784998

You can use \w in place of \d to match [a-zA-Z0-9_]:

^(?!(?:(\w)\1+[ -]*)+$)\w[\w -]+$

RegEx Demo

Upvotes: 2

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