Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

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

/
/
g

Test String

Code Generator

Language

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "errorDescription\"\:\"(?<errorDescription>[^\"]+).+errorCode\"\:\"(?<errorCode>[^\"]+)" Local $sString = "2016-10-25 12:33:31,926 [http-00000:13111-2] INFO [org.apache.cxf.interceptor.LoggingInInterceptor ?] Inbound Message ---------------------------- " & @CRLF & _ " ID: 18 Response-Code: 200" & @CRLF & _ " Encoding: UTF-8 " & @CRLF & _ " Content-Type: application/json;charset=UTF-8" & @CRLF & _ " Headers: {content-type=[application/json;charset=UTF-8], Date=[Tue, 25 Oct 2016 17:33:30 GMT], Expires=[Thu, 01 Jan 1970 00:00:00 GMT], Set-Cookie=[BrowserId=L8p9Eij0T4Sfp-INSP9zDw;Path=/;Domain=.salesforce;Expires=Sat, 24-Dec-2016 17:33:30 GMT], transfer-encoding=[chunked]} " & @CRLF & _ " " & @CRLF & _ " Payload: {"responseCode":"201","messageId":"704c8163-13d4-42b8-a684-94b9d23e849e"," & @CRLF & _ " "lead":[{"responseCode":"201","leadID":null,"errors":[{"errorField":"head","errorDescription":"The value of email is invalid.","errorCode":"Value_Invalid_E400"},{"errorField":"bestTimeToContact","errorDescription":"The value of bestTimeToContact is invalid.","errorCode":"Value_Invalid_E400"}]}]} " & @CRLF & _ " ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------" & @CRLF & _ " 2016-10-25 12:33:31,986 [http-000000:13111-2] INFO [org.apache.cxf.interceptor.LoggingOutInterceptor ?] Outbound Message --------------------------- " & @CRLF & _ " ID: 17 " & @CRLF & _ " Response-Code: 200 " & @CRLF & _ " Content-Type: application/json" & @CRLF & _ " Headers: {Content-Type=[application/json], Date=[Tue, 25 Oct 2016 17:33:31 GMT]}" & @CRLF & _ " Payload: {"errors":[{"errorCode":"Value_Invalid_E400","errorDescription":"The value of email is invalid.","errorField":"head"},{"errorCode":"Value_Invalid_E400","errorDescription":"The value of bestTimeToContact is invalid.","errorField":"bestTimeToContact"}]} --------------------------------------" 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