Regular Expressions 101

Please wait while the app is loading...

Regular Expressions 101

@regex101DonateSponsorContactBug Reports & FeedbackWikiWhat's new?

Order By

Sponsors

Library entries

2
python

.*(\d+).* Selects last number

no description available
Submitted by anonymous - 7 years ago
2
pcre

Eircode

Eircode validation for new postcodes identifiers in Republic of Ireland. Case-insensetive for easier user input. Added optional space separator to follow same pattern as in UK post codes and in examples used in eircode spec.
Submitted by Arek Jaworski - 7 years ago
2
pcre

Match multiline comments /* ... */

It won't match single line comments like this one: //* This comment won't be match */ ^ see the double / Works in PHP without the g modifier.
Submitted by SimonaHalep - 7 years ago
2
pcre

php naming convension (classes, vars, functions, constants)

PHP Basic coding standard Naming Convension pattern: /^\pL_*$/
Submitted by Najmuddeen Mohammed - 6 years ago
2
golang

domain for Google Data Studio (re2 dialect)

Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want
Submitted by anonymous - 6 years ago
2
python

Ansible Host Var checking

We had an issue where the "hosts=some_var" value could cause mass deployments if the wrong value was passed through. Specifically a comma with nothing surrounding it (i.e. "hosts=,"). This regex will allow us to fail when certain characters are present.
Submitted by anonymous - 6 years ago
2
pcre

check name

no description available
Submitted by anonymous - 6 years ago
2
pcre

URL parser

The best way to parse URL via Regex. This can be used in javascript, PHP, etc.
Submitted by Ivijan-Stefan Stipic - 6 years ago
2
pcre

Matching Character Class Transitions (customization of \b)

\b can be replicated as (?<=\w)(?=\W)|(?<=\W)(?=\w) Understanding how to create these class transitions can be beneficial for several reasons. In this instance, counting the results of this regex can be used to measure randomness within strings containing multiple character classes.
Submitted by @notGeorgePBurdell - 5 years ago
2
pcre

NSU ID Card Checker

no description available
Submitted by anonymous - 5 years ago
2
pcre

Better version of UK postcode

This UK postcode regex will match all variants of postcode formats including inner London postcodes (eg SW1A), with optional space (both AL11XP and AL1 1XP are valid) It will reject any postcode that does not specify a valid postcode area. Each part of the postcode is also captured into a capture ...
Submitted by anonymous - 5 years ago
2
pcre

Match "A B C" where A+B=C (final version)

no description available
Submitted by anonymous - 4 years ago
3
python

Capture Query Strings

A solution for capture query params.
Submitted by Rafael Laurindo - 7 years ago
3
pcre

Get any positive integer

All real numbers can be divided into three categories: positive, negative and zero; Match all positive number Match: 2 9...
Submitted by norihiori, Me-me - 7 years ago
3
pcre

Validate Argentinian postal code

Validates CPA (Código Postal Argentino, spanish for Argentinian Postal Code).
Submitted by Agustín Bouillet - 7 years ago
3
pcre

Validates argentinian postal code

Validates the two valid postal codes in Argentina
Submitted by Agustín Bouillet - 7 years ago
3
pcre

Song Splitter

Split an audio filename into a readable format for playlists (like jPlayer) assuming the audio file is named like the following: Artist - Song Title.mp3 Band Name - Track Title ft. Another Artist.m4a demon.devin - Faithless Angel (to no avail remix).mp3
Submitted by demon.devin - 7 years ago
3
python

Email

Python
Submitted by anonymous - 7 years ago
3
python

Thorough UK Postcode Validator with In/Out code capture groups

A more thorough UK postcode validator tested against all UK postcodes on a regular basis, but excluding the special GIRO postcode case out of personal preference. Additionally has capture groups for the In-code and Out-code sections. Requires case insensitive matching.
Submitted by Chris G - 6 years ago
3
pcre

strong password validation

This regex matches only when all the following are true: password has minimum 2 uppercase letters password has minimum 2 lowercase letters password has minimum 2 numerals (0-9) password has minimum 2 special characters, of the group !@#$%^&*()-_=+{};:, password has no more than 2 consecutive identic...
Submitted by anonymous - 6 years ago
1...660661662663664665666...675

Twitter @mentions

Vote

-8

Regular Expression
python

"
(\A|\s)@(\w+)
"
g
Open regex in editor

Description

Loading markdown...
Submitted by @triplec1988 - 9 years ago