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
No Match

/
/
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "^(Depense|Recette)_Aller_\d*_*(FEDER|RR974|POCT)_\d{2}_\d{4}_\d{1,2}_\d+C\w*.xml$" Local $sString = "Depense_Aller_4689.xml : flux PJ seul, bordereau déjà envoyé, à ne pas signer" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_4659_661C.xml : flux complet, à signer DAF" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_FEDER_01_2017_1_19C.xml" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_FEDER_01_2017_1_19C_Auto.xml" & @CRLF & _ "Depense_Aller_7864_FEDER_01_2017_2_19C_Auto.xml" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_4344_SMPRR_01_2017_2_34C_Auto.xml" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_4344_RR974_01_2017_6_566C_Auto.xml" & @CRLF & _ "Depense_Aller_4038_RR974_01_2017_473C_Auto.xml" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_3469_RR974_01_2017_271C_Auto.xml : flux complet paye, à signer RH" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_4271_FEDER_01_2016_5A_Auto.xml : flux en annulation, à ne pas signer" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_2649_RR974_01_2017_5C_Auto.xml : flux indemnités élus Région, à signer par ?" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_3222_RR974_01_2017_216C_Auto.xml : flux indemnités élus CESER, à signer par ?" & @CRLF & _ "" & @CRLF & _ "Depense_Aller_3222_RR974_01_2017_219C_Auto.xml : flux indemnités élus CCEE, à signer par ?" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "Appgfi\wwwGFTEST\astre\astromate\pes\recette :" & @CRLF & _ "" & @CRLF & _ "Recette_Aller_4271_RR974_01_2017_6C_Auto.xml : flux recette, à signer DAF" & @CRLF & _ "" & @CRLF & _ "Recette_Aller_4271_RR974_01_2016_21A_Auto.xml : flux recette en annulation, à ne pas signer" & @CRLF & _ "" Local $sSubst = "" Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst) MsgBox($MB_SYSTEMMODAL, "Result", $sResult)

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