Regular Expressions 101

Save & Share

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

r"""
"""
gmis

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"https?:\/\/www.gamecoin.com.br/category/[\w-]+/$"; string input = @"https://www.gamecoin.com.br/false#cmplz-manage-consent-container https://www.gamecoin.com.br/false#cmplz-cookies-overview https://www.gamecoin.com.br/false#cmplz-tcf-wrapper https://cookiedatabase.org/tcf/purposes/ https://www.gamecoin.com.br/false#cmplz-manage-consent-container https://www.gamecoin.com.br/politica-de-privacidade/ https://www.gamecoin.com.br/# https://www.gamecoin.com.br/#content https://www.gamecoin.com.br/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/category/games-2022/ https://www.gamecoin.com.br/category/review/ https://www.gamecoin.com.br/category/jogue-outra-vez/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/category/mobile-2/ https://www.gamecoin.com.br/category/lista-gamecoin/ https://www.gamecoin.com.br/sobre-o-gamecoin/ https://www.gamecoin.com.br/politica-de-privacidade/ https://www.gamecoin.com.br/category/artigo/ https://www.gamecoin.com.br/category/artigo/ https://www.youtube.com/garagemdojabulas https://www.gamecoin.com.br/web-stories/quem-e-o-cara-do-doom%3f/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/jogue-outra-vez-spider-man-ps4-ps5-pc/ https://www.gamecoin.com.br/hbo-max-the-last-of-us-em-carne-osso-luzes-e-acao/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/super-contra-chega-aos-35-anos-e-poucos-viram-os-creditos/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/game-stick-super-nintendo/ https://www.gamecoin.com.br/jogue-outra-vez-spider-man-ps4-ps5-pc/ https://www.gamecoin.com.br/pokemon-scarlet/ https://www.gamecoin.com.br/shadow-samurai-revenge/ https://www.gamecoin.com.br/review-jogamos-sonic-frontiers-no-nintendo-switch/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/super-contra-chega-aos-35-anos-e-poucos-viram-os-creditos/ https://www.gamecoin.com.br/super-contra-chega-aos-35-anos-e-poucos-viram-os-creditos/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/game-stick-super-nintendo/ https://www.gamecoin.com.br/game-stick-super-nintendo/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/flashback-30-anos/ https://www.gamecoin.com.br/flashback-30-anos/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/mobile-2/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/super-mario-land-game-boy/ https://www.gamecoin.com.br/super-mario-land-game-boy/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/gran-turismo-25-anos/ https://www.gamecoin.com.br/gran-turismo-25-anos/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/jogue-outra-vez-spider-man-ps4-ps5-pc/ https://www.gamecoin.com.br/jogue-outra-vez-spider-man-ps4-ps5-pc/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/dead-island-jogue-outra-vez/ https://www.gamecoin.com.br/dead-island-jogue-outra-vez/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/jogue-outra-vez-castlevania-lords-of-shadow/ https://www.gamecoin.com.br/jogue-outra-vez-castlevania-lords-of-shadow/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/jogue-outra-vez-o-assustador-the-evil-within/ https://www.gamecoin.com.br/jogue-outra-vez-o-assustador-the-evil-within/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/10-anos-de-call-of-duty-black-ops/ https://www.gamecoin.com.br/10-anos-de-call-of-duty-black-ops/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/super-mario-land-game-boy/ https://www.gamecoin.com.br/pokemon-scarlet/ https://www.gamecoin.com.br/shadow-samurai-revenge/ https://www.gamecoin.com.br/return-to-monkey-island/ https://www.gamecoin.com.br/category/lista-gamecoin/ https://www.gamecoin.com.br/10-games-para-esperar-gta-6-chegar/ https://www.gamecoin.com.br/10-games-para-esperar-gta-6-chegar/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/lista-gamecoin/ https://www.gamecoin.com.br/10-games-da-franquia-alien-para-jogar/ https://www.gamecoin.com.br/10-games-da-franquia-alien-para-jogar/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/lista-gamecoin/ https://www.gamecoin.com.br/super-herois-10-games-de-para-mega-drive-e-snes/ https://www.gamecoin.com.br/super-herois-10-games-de-para-mega-drive-e-snes/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/lista-gamecoin/ https://www.gamecoin.com.br/batman-10-games-do-homem-morcego/ https://www.gamecoin.com.br/batman-10-games-do-homem-morcego/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/lista-gamecoin/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/8-de-marco-quatro-games-para-lutar-como-uma-garota/ https://www.gamecoin.com.br/8-de-marco-quatro-games-para-lutar-como-uma-garota/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/assinatura-de-games-e-locadora-da-era-digital/ https://www.gamecoin.com.br/assinatura-de-games-e-locadora-da-era-digital/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/lista-gamecoin/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/simulador-simcade-e-arcade-as-diferencas-entre-cada-estilo/ https://www.gamecoin.com.br/simulador-simcade-e-arcade-as-diferencas-entre-cada-estilo/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/doom-coelhinhas-e-minecraft/ https://www.gamecoin.com.br/doom-coelhinhas-e-minecraft/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/the-witcher-iii-os-segredos-que-fazem-dele-o-melhor-jogo-da-geracao/ https://www.gamecoin.com.br/the-witcher-iii-os-segredos-que-fazem-dele-o-melhor-jogo-da-geracao/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/e3-para-elas/ https://www.gamecoin.com.br/e3-para-elas/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/30-anos-de-the-addams-family-nos-games/ https://www.gamecoin.com.br/30-anos-de-the-addams-family-nos-games/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/pipoca-e-joystick-the-hunt-for-red-october/ https://www.gamecoin.com.br/pipoca-e-joystick-the-hunt-for-red-october/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/robocop-3/ https://www.gamecoin.com.br/robocop-3/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/category/oldies/ https://www.gamecoin.com.br/terminator/ https://www.gamecoin.com.br/terminator/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/category/noticias/ https://www.gamecoin.com.br/iron-man/ https://www.gamecoin.com.br/iron-man/ https://www.gamecoin.com.br/author/marcelo/ https://www.gamecoin.com.br/jogue-outra-vez-spider-man-ps4-ps5-pc/ https://www.gamecoin.com.br/hbo-max-the-last-of-us-em-carne-osso-luzes-e-acao/ https://www.gamecoin.com.br/super-contra-chega-aos-35-anos-e-poucos-viram-os-creditos/ https://www.gamecoin.com.br/game-stick-super-nintendo/ https://www.gamecoin.com.br/flashback-30-anos/ https://www.gamecoin.com.br/super-mario-land-game-boy/ https://www.gamecoin.com.br/gran-turismo-25-anos/ https://www.gamecoin.com.br/pokemon-scarlet/ https://www.gamecoin.com.br/need-for-speed-unbound/ https://www.gamecoin.com.br/shadow-samurai-revenge/ https://www.gamecoin.com.br/gta-25-anos/ https://www.gamecoin.com.br/review-jogamos-sonic-frontiers-no-nintendo-switch/ https://www.gamecoin.com.br/splinter-cell-20-anos/ https://www.gamecoin.com.br/call-of-duty-modern-warfare-2/ https://www.gamecoin.com.br/god-of-war-ragnarok/ https://www.gamecoin.com.br/gta-san-andreas/ https://www.gamecoin.com.br/return-to-monkey-island/ https://www.gamecoin.com.br/mortal-kombat-30-anos/ https://www.gamecoin.com.br/super-mario-kart-30-anos/ https://www.gamecoin.com.br/nintendo-switch-lite-e-toda-infancia-no-bolso/ https://www.gamecoin.com.br/street-fighter-35-anos/ https://www.gamecoin.com.br/after-burner-35-anos/ https://www.gamecoin.com.br/indiana-jones-and-the-fate-of-atlantis-chega-aos-30-anos/ https://www.gamecoin.com.br/diablo-immortal-jogamos-no-a53-s20-e-redmi/ https://mantrabrain.com/ "; RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnoreCase | RegexOptions.Singleline; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx