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

/
/
m

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)forward-zone:[.\s]*name:[\ ".\s]*forward" Local $sString = "## Simple recursive caching DNS, UDP port 53" & @CRLF & _ "## unbound.conf -- https://calomel.org" & @CRLF & _ "#" & @CRLF & _ "server:" & @CRLF & _ " access-control: 10.0.0.0/8 allow" & @CRLF & _ " access-control: 127.0.0.0/8 allow" & @CRLF & _ " access-control: 192.168.0.0/16 allow" & @CRLF & _ " cache-max-ttl: 14400" & @CRLF & _ " cache-min-ttl: 900" & @CRLF & _ " hide-identity: yes" & @CRLF & _ " hide-version: yes" & @CRLF & _ " interface: 0.0.0.0" & @CRLF & _ " minimal-responses: yes" & @CRLF & _ " prefetch: yes" & @CRLF & _ " qname-minimisation: yes" & @CRLF & _ " rrset-roundrobin: yes" & @CRLF & _ " use-caps-for-id: yes" & @CRLF & _ " verbosity: 1" & @CRLF & _ "" & @CRLF & _ "forward-zone:" & @CRLF & _ " name: "."" & @CRLF & _ " forward-addr: 8.8.4.4 # Google" & @CRLF & _ " forward-addr: 8.8.8.8 # Google" & @CRLF & _ " forward-addr: 37.235.1.174 # FreeDNS" & @CRLF & _ " forward-addr: 37.235.1.177 # FreeDNS" & @CRLF & _ " forward-addr: 208.67.222.220 # OpenDNS" & @CRLF & _ " forward-addr: 208.67.222.222 # OpenDNS" & @CRLF & _ " forward-addr: 216.146.35.35 # Dyn Public" & @CRLF & _ " forward-addr: 216.146.36.36 # Dyn Public" & @CRLF & _ "" & @CRLF & _ "forward-zone:" & @CRLF & _ " name: "dns.com"" & @CRLF & _ " forward-addr: 50.116.23.211 # OpenNIC" & @CRLF & _ " forward-addr: 64.6.64.6 # Verisign" & @CRLF & _ " forward-addr: 64.6.65.6 # Verisign" & @CRLF & _ " forward-addr: 74.82.42.42 # Hurricane Electric" & @CRLF & _ " forward-addr: 84.200.69.80 # DNS Watch" & @CRLF & _ " forward-addr: 84.200.70.40 # DNS Watch" & @CRLF & _ " forward-addr: 91.239.100.100 # censurfridns.dk" & @CRLF & _ " forward-addr: 109.69.8.51 # puntCAT" & @CRLF & _ "" Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYFULLMATCH) ; Present the entire match result _ArrayDisplay($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