Regular Expressions 101

Movin4Life.org

test

Given a string, the regex would match if it is a valid IPv4 address.

Check if a string contains the word word in it (case insensitive). If you have no idea, I guess you could try /word/.

Sri Lankan Land/Fixed-line Telephone Number Validation This expression validates if a given value is a valid Sri Lankan fixed line / land line telephone number. Sri Lankan land line numbers starts from 0 and does not contain 7 in the 2nd digit, and is 10 digits in length. ...

See https://en.wikipedia.org/wiki/Telephone_numbers_in_Sri_Lanka

This regex separates numbers with commas taking 0 into account.

Regex validação número celular e fixo Somente números nacionais Com ou sem DDI 55 (com ou sem + e/ou 00) DDD obrigatório (com ou sem parênteses) Com ou sem Dígito 9...

Regex validação número celular e fixo Somente números nacionais Com ou sem DDI 55 (com ou sem + e/ou 00) DDD obrigatório (com ou sem parênteses) Com ou sem Dígito 9...

222

with obfuscation

Regex for parsing markdown link. Named group "text", "url" and "alt.

Sri Lankans have two types of identifiation numbers. National Identity Card number Sri Lanka Identity Number National Identity Card number...

This regex captures the IDs in a message link in separate capture groups. Warning: Due to my personal use case, it doesn't care if it's a real Discord message URL. You can pretty easily add that yourself if you need it tho. Capturing groups: Match 1: The whole ID string starting with / and may be e...

nginx access log regex

RFC5322 with WHATWG standard email id regex pattern

Regex for validating ISO 8601:2004E durations, complete with named capture groups.

(^([0-9]{2,3}.)([0-9]{2,3}.)([0-9]{2,3}.)([0-9]{2,3})$)

Replaces one style of markdown image with another

Given a string, find matching parenthesis, brackets, and/or curly brackets.