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

/
/
gmi

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 = "(?mi)(\B(\?\?|\?)|\B(\!\!|\!)|\B(\[\])|\b(RWC)|\b(TODO))[:;.,-]?\d*($|\s.*$|\(.*$)" Local $sString = "# Oh yeah, good luck with that." & @CRLF & _ "?? Can I use the gun?" & @CRLF & _ "" & @CRLF & _ "Enough about your promiscuous mother, Hermes! We have bigger problems. " & @CRLF & _ "" & @CRLF & _ "!!- Guards! Bring me the forms I need to fill out to have her taken away! " & @CRLF & _ "" & @CRLF & _ "TODO Shinier than yours, meatbag. " & @CRLF & _ "" & @CRLF & _ "- Wow, you got that off the Internet? " & @CRLF & _ "- In my day, the Internet was only used to download pornography." & @CRLF & _ "" & @CRLF & _ "Would you censor the Venus de Venus just because you can see her spewers? " & @CRLF & _ "! No argument here. " & @CRLF & _ "" & @CRLF & _ "RWC: Oh no! The professor will hit me! " & @CRLF & _ "[] But if Zoidberg 'fixes' it… then perhaps gifts! " & @CRLF & _ "" & @CRLF & _ "I was all of history's great robot actors - Acting Unit 0. 8; Thespomat; David Duchovny!" & @CRLF & _ "" & @CRLF & _ "[] Five hours? Aw, man! Couldn't you just get me the death penalty?" & @CRLF & _ "" & @CRLF & _ "When I was first asked to make a film about my nephew, Hubert Farnsworth, I thought "Why should I?" Then later, Leela made the film. But if I did make it, you can bet there would have been more topless women on motorcycles. Roll film! Um, is this the boring, peaceful kind of taking to the streets?" & @CRLF & _ "" 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