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

r"
"
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)^((?P<a>[0-9]{1,3})-)?((?P<b>[0-9]{1,3}):)?(?P<cde>(?P<c>[0-9A-F]{1,3}).(?P<d>[0-9A-F]{1,3})(.(?P<e>[0-9A-F]{1,3}))?)([\*\&](?P<f>[0-9A-F]{1,3}))?\((?P<value>[^*^\)]*)(([\*])(?P<unit>\w*))?\)$" Local $sString = "0-1:F.F.0*255(000000000000000)" & @CRLF & _ "0-1:F.F.2*255(000000000111100)" & @CRLF & _ "0-1:0.0.0*255(1ZPA0020280814)" & @CRLF & _ "1-0:C.1.0*255(0020280814)" & @CRLF & _ "1-0:0.0.2*255(4U110017012)" & @CRLF & _ "1-0:0.0.3*255(00000000)" & @CRLF & _ "1-0:0.9.1*255(22:38:32)" & @CRLF & _ "1-0:0.9.2*255(23-12-28)" & @CRLF & _ "1-0:0.2.0*255(05 r01)" & @CRLF & _ "1-0:0.1.2*01(231201000000)" & @CRLF & _ "1-0:0.1.2*02(231101000000)" & @CRLF & _ "1-0:0.1.2*03(231001000000)" & @CRLF & _ "1-0:0.1.2&04(230927075308)" & @CRLF & _ "1-0:1.8.0*255(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.0*254(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.0*01(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.0*02(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.0*03(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.0&04(000000.0000*kWh)" & @CRLF & _ "1-0:1.8.1*255(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.1*254(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.1*01(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.1*02(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.1*03(000003.6382*kWh)" & @CRLF & _ "1-0:1.8.1&04(000000.0000*kWh)" & @CRLF & _ "1-0:1.8.2*255(000000.0000*kWh)" & @CRLF & _ "1-0:1.8.2*254(000000.0000*kWh)" & @CRLF & _ "1-0:1.8.2*01(000000.0000*kWh)" & @CRLF & _ "1-0:1.8.2*02(000000.0000*kWh)" & @CRLF & _ "1-0:1.8.2*03(000000.0000*kWh)" & @CRLF & _ "1-0:1.8.2&04(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.0*255(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.0*254(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.0*01(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.0*02(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.0*03(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.0&04(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.1*255(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.1*254(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.1*01(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.1*02(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.1*03(000000.6248*kWh)" & @CRLF & _ "1-0:2.8.1&04(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.2*255(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.2*254(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.2*01(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.2*02(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.2*03(000000.0000*kWh)" & @CRLF & _ "1-0:2.8.2&04(000000.0000*kWh)" & @CRLF & _ "1-0:0.2.2*255(00750101)" & @CRLF & _ "1-0:C.15.0*255(23-04-07)" & @CRLF & _ "1-0:0.2.6*255(intErn)" & @CRLF & _ "1-0:C.6.0*255(00 00:07:33)" & @CRLF & _ "1-0:C.14.0*255(T2)" & @CRLF & _ "1-0:C.9.0*255(+27.0*C)" & @CRLF & _ "1-0:C.6.3*255(3.66*V)" & @CRLF & _ "1-0:C.1.6*255(98FC51FF)" 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