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

r"
"
gm

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 = "(?m)\S+\d\.\d+" Local $sString = "Internet Uplink FON 41.79.9.117 : Successful" & @CRLF & _ "Microtik 194.201.253.246 : Successful" & @CRLF & _ "Rooftop Switch 213.150.96.166: Successful" & @CRLF & _ "" & @CRLF & _ " TELNET TEST" & @CRLF & _ " telnet mail.kenyaweb.com 25 : Connected to mail.kenyaweb.com. Escape character is '^]'. 220 mail.kenyaweb.com ESMTP Postfix" & @CRLF & _ " telnet mail.kenyaweb.com 110: Connected to mail.kenyaweb.com. Escape character is '^]'. +OK POP3 ready" & @CRLF & _ "" & @CRLF & _ " MAIL SERVERS" & @CRLF & _ " mail.kenyaweb.com 194.201.253.165 : Successful" & @CRLF & _ " Relay.kenyaweb.com 194.201.253.124 : Successful" & @CRLF & _ " pop.kenyaweb.com 194.201.253.11 : Successful" & @CRLF & _ " hosting.kenyaweb.com 194.201.253.132 : Successful" & @CRLF & _ "" & @CRLF & _ " WEB SERVERS" & @CRLF & _ "Web server 1 194.201.253.70 : Successful" & @CRLF & _ "Web server 2 194.201.253.8 : Successful" & @CRLF & _ "Web Server 3 194.201.253.5 : Successful" & @CRLF & _ "sungura.kenyaweb.com 192.64.112.132: Successful" & @CRLF & _ " " & @CRLF & _ "" & @CRLF & _ " DNS" & @CRLF & _ " Linux.form-net.com 194.201.253.105 : Successful" & @CRLF & _ " ns200.kenyaweb.com 194.201.253.186 : Successful" & @CRLF & _ " ns201.kenyaweb.com 194.201.253.189 : Successful" & @CRLF & _ " ns203.kenyaweb.com 63.250.47.221 : Successful" & @CRLF & _ "" & @CRLF & _ " BROWSE TEST" & @CRLF & _ " www.kenyaweb.com http://www.kenyaweb.com : Successful" & @CRLF & _ " www.yahoo.com http://www.yahoo.com : Successful" & @CRLF & _ " www.google.com http://www.google.com : Successful" & @CRLF & _ "" & @CRLF & _ " MAIL TEST" & @CRLF & _ " Mail.Kenyaweb to yahoo : Received" & @CRLF & _ " Mail.Kenyaweb to gmail : Received" & @CRLF & _ " Yahoo to Mail.Kenyaweb : Received" & @CRLF & _ " Gmail to Mail.Kenyaweb : Received" 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