Regular Expressions 101

Save & Share

  • Regex Version: ver. 4
  • 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"
"

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 = "Subject\s*:\s*(?P<subject>.+)" Local $sString = "From 1488780641874111180@xxx Mon Dec 29 12:11:00 2014" & @CRLF & _ "X-GM-THRID: 1488780145305309925" & @CRLF & _ "X-Gmail-Labels: Sent,Important" & @CRLF & _ "MIME-Version: 1.0" & @CRLF & _ "Received: by 10.52.29.70 with HTTP; Sun, 28 Dec 2014 16:11:00 -0800 (PST)" & @CRLF & _ "X-Originating-IP: [82.13.144.221]" & @CRLF & _ "In-Reply-To: <01ff42fddfded95cfa8b14fa5559b0fb.squirrel@webmail04.register.com>" & @CRLF & _ "References: <01ff42fddfded95cfa8b14fa5559b0fb.squirrel@webmail04.register.com>" & @CRLF & _ "Date: Mon, 29 Dec 2014 00:11:00 +0000" & @CRLF & _ "Delivered-To: hello@domain.co" & @CRLF & _ "Message-ID: <CAN8wjQQWm33RS-hDdE1k3c6CMOge9-eq=3GrcNssV8gPYi+osA@mail.gmail.com>" & @CRLF & _ "Subject: Re:<<<regading account : creation>>>" & @CRLF & _ "From: DG <hello@domain.co>" & @CRLF & _ "To: info@otherdomain.us" & @CRLF & _ "Content-Type: multipart/alternative; boundary=001a11c2183a9b3b4e050b4fb549" & @CRLF & _ "--001a11c2183a9b3b4e050b4fb549" & @CRLF & _ "Content-Type: text/plain; charset=UTF-8" & @CRLF & _ "Hey Chris," & @CRLF & _ "Is that price for the pass with tax?" & @CRLF & _ "Also do you have any recommendations for good rental places in town?" & @CRLF & _ "Cheers," & @CRLF & _ "-dave" 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