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

/
/
gm

Test String

Code Generator

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?m)^https?:\/\/(?:www\.)?twitter\.com\/(?:#!\/)?@?([^/?#]*)(?:[?#].*)?$" Local $sString = "https://twitter.com/TeleFootball" & @CRLF & _ "https://twitter.com/GoalUSA" & @CRLF & _ "https://twitter.com/goal_intl" & @CRLF & _ "https://twitter.com/GoalItalia" & @CRLF & _ "https://twitter.com/TMuk_news" & @CRLF & _ "https://twitter.com/TMit_news" & @CRLF & _ "https://twitter.com/footballitalia" & @CRLF & _ "https://twitter.com/footballespana_" & @CRLF & _ "https://twitter.com/cmdotcom" & @CRLF & _ "https://twitter.com/24CalcioMercato" & @CRLF & _ "https://twitter.com/TuttoMercatoWeb" & @CRLF & _ "https://twitter.com/GFN_France" & @CRLF & _ "https://twitter.com/TopMercato" & @CRLF & _ "https://twitter.com/sambafoot" & @CRLF & _ "https://twitter.com/WhoScored" & @CRLF & _ "https://twitter.com/fantagazzetta?original_referer=http%3A%2F%2Fwww.fantagazzetta.com%2F&profile_id=81810036&tw_i=618947696691384321&tw_p=embeddedtimeline&tw_w=329873702915276800" & @CRLF & _ "https://twitter.com/@UEFAcom" & @CRLF & _ "https://twitter.com/lestransferts" & @CRLF & _ "https://twitter.com/francefootball " & @CRLF & _ "https://twitter.com/footmercato" & @CRLF & _ "https://twitter.com/@FutbolFinanzas" & @CRLF & _ "https://twitter.com/MARCAinENGLISH" & @CRLF & _ "https://twitter.com/AS_Futbol" & @CRLF & _ "https://twitter.com/mundodeportivo" & @CRLF & _ "https://twitter.com/donbalon_com" & @CRLF & _ "https://twitter.com/insidewldftball" & @CRLF & _ "https://twitter.com/calciomercatoit" & @CRLF & _ "https://twitter.com/_football411" & @CRLF & _ "https://twitter.com/BBCFtbl" & @CRLF & _ "https://twitter.com/CNNFC" & @CRLF & _ "https://twitter.com/foxsoccer" & @CRLF & _ "https://twitter.com/ProSoccerTalk" & @CRLF & _ "https://twitter.com/beINSportsUSA" & @CRLF & _ "https://twitter.com/mirrorfootball" & @CRLF & _ "https://twitter.com/ESPNFC" & @CRLF & _ "https://twitter.com/DiMarzio" & @CRLF & _ "https://twitter.com/tribalfootball" & @CRLF & _ "https://twitter.com/WorldSoccerMag" & @CRLF & _ "https://twitter.com/SkyFootball" & @CRLF & _ "https://twitter.com/TheSunFootball" & @CRLF & _ "https://twitter.com/foot365" & @CRLF & _ "https://twitter.com/Mercato365" & @CRLF & _ "https://twitter.com/sofoot" & @CRLF & _ "https://twitter.com/abolapt" & @CRLF & _ "https://twitter.com/fanatikcomtr" & @CRLF & _ "https://twitter.com/kicker_bl_li" & @CRLF & _ "https://twitter.com/vi_nl" & @CRLF & _ "https://twitter.com/elfvoetbal" & @CRLF & _ "https://twitter.com/tipsbladet" & @CRLF & _ "https://twitter.com/KickOffMagazine" & @CRLF & _ "https://twitter.com/sportalkorea" & @CRLF & _ "https://twitter.com/Bundesliga_EN" & @CRLF & _ "https://twitter.com/FFScout" & @CRLF & _ "https://twitter.com/GAMBA_OFFICIAL" & @CRLF & _ "https://twitter.com/Squawka" & @CRLF & _ "https://twitter.com/StatsBomb" & @CRLF & _ "https://twitter.com/mediotiempo" & @CRLF & _ "https://twitter.com/soccerly" Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH) Local $aFullArray[0] For $i = 0 To UBound($aArray) -1 _ArrayConcatenate($aFullArray, $aArray[$i]) Next $aArray = $aFullArray ; Present the entire match result _ArrayDisplay($aArray, "Result")

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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm