Regular expression checking URLs, only allowing lowercase

Asked Sep 30 '16 at 09:05

Active Sep 30 '16 at 09:05

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I am trying to create a regular expression for a Google Forms field. The goal is to only allow users to enter a URL in a very specific format:

Examples

What I achieved so far is the first two criteria, but how can I force only lower case characters?

([\da-z\.-]+)\.([a-z\.]{2,6})

Thanks a lot!

asked Sep 30 '16 at 09:05

Enrico Paul

1

Your regex **already** allows only lower case characters. (As long as you don't set the `I`gnore case flag.) – SamWhan Sep 30 '16 at 09:06
The `[\da-z.-]+\.[a-z.]{2,6}` with *Regular Expression* -> *Matches* mode works for me. – Wiktor Stribiżew Sep 30 '16 at 09:10
Sorry! Have to admit that it works in Google Forms. However, I want to use the same for data validation in a Google Sheets cell. There, the formula `=REGEXMATCH(A1, "([\da-z\.-]+)\.([a-z\.]{2,6})")` does return TRUE for Uppercase characters instead of FALSE – Enrico Paul Sep 30 '16 at 09:11
I guess you need `^[\da-z.-]+\.[a-z.]{2,6}$`. – Wiktor Stribiżew Sep 30 '16 at 09:14
Awesome, that's it! Thank you for the very fast help! – Enrico Paul Sep 30 '16 at 09:17

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