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

/
/
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)([^\n\r:]*)(:[ \t])[ \t]*([^\n\r]*)" Local $sString = "NetRange: 2001:4860:: - 2001:4860:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF" & @CRLF & _ "CIDR: 2001:4860::/32" & @CRLF & _ "NetName: GOOGLE-IPV6" & @CRLF & _ "NetHandle: NET6-2001-4860-1" & @CRLF & _ "Parent: ARIN-004 (NET6-2001-4800-0)" & @CRLF & _ "NetType: Direct Allocation" & @CRLF & _ "OriginAS: AS15169" & @CRLF & _ "Organization: Google LLC (GOGL)" & @CRLF & _ "RegDate: 2005-03-14" & @CRLF & _ "Updated: 2012-02-24" & @CRLF & _ "Ref: https://rdap.arin.net/registry/ip/2001:4860::" & @CRLF & _ "" & @CRLF & _ "OrgName: Google LLC" & @CRLF & _ "OrgId: GOGL" & @CRLF & _ "Address: 1600 Amphitheatre Parkway" & @CRLF & _ "City: Mountain View" & @CRLF & _ "StateProv: CA" & @CRLF & _ "PostalCode: 94043" & @CRLF & _ "Country: US" & @CRLF & _ "RegDate: 2000-03-30" & @CRLF & _ "Updated: 2019-10-31" & @CRLF & _ "Comment: Please note that the recommended way to file abuse complaints are located in the following links. " & @CRLF & _ "Comment: " & @CRLF & _ "Comment: To report abuse and illegal activity: https://www.google.com/contact/" & @CRLF & _ "Comment: " & @CRLF & _ "Comment: For legal requests: http://support.google.com/legal " & @CRLF & _ "Comment: " & @CRLF & _ "Comment: Regards, " & @CRLF & _ "Comment: The Google Team" & @CRLF & _ "Ref: https://rdap.arin.net/registry/entity/GOGL" & @CRLF & _ "" & @CRLF & _ "OrgTechHandle: ZG39-ARIN" & @CRLF & _ "OrgTechName: Google LLC" & @CRLF & _ "OrgTechPhone: +1-650-253-0000 " & @CRLF & _ "OrgTechEmail: arin-contact@google.com" & @CRLF & _ "OrgTechRef: https://rdap.arin.net/registry/entity/ZG39-ARIN" & @CRLF & _ "OrgAbuseHandle: ABUSE5250-ARIN" & @CRLF & _ "OrgAbuseName: Abuse" & @CRLF & _ "OrgAbusePhone: +1-650-253-0000 " & @CRLF & _ "OrgAbuseEmail: network-abuse@google.com" & @CRLF & _ "OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE5250-ARIN" & @CRLF & _ "RNOCHandle: ZG39-ARIN" & @CRLF & _ "RNOCName: Google LLC" & @CRLF & _ "RNOCPhone: +1-650-253-0000 " & @CRLF & _ "RNOCEmail: arin-contact@google.com" & @CRLF & _ "RNOCRef: https://rdap.arin.net/registry/entity/ZG39-ARIN" & @CRLF & _ "RTechHandle: ZG39-ARIN" & @CRLF & _ "RTechName: Google LLC" & @CRLF & _ "RTechPhone: +1-650-253-0000 " & @CRLF & _ "RTechEmail: arin-contact@google.com" & @CRLF & _ "RTechRef: https://rdap.arin.net/registry/entity/ZG39-ARIN" & @CRLF & _ "RAbuseHandle: ZG39-ARIN" & @CRLF & _ "RAbuseName: Google LLC" & @CRLF & _ "RAbusePhone: +1-650-253-0000 " & @CRLF & _ "RAbuseEmail: arin-contact@google.com" & @CRLF & _ "RAbuseRef: https://rdap.arin.net/registry/entity/ZG39-ARIN" 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