Regular Expressions 101

Save & Manage Regex

  • Current Version: 1
  • Save & Share
  • Community Library

Flavor

  • PCRE2 (PHP)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java
  • .NET 7.0 (C#)
  • Rust
  • PCRE (Legacy)
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests
Sponsors
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
Processing...

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 $sRegex = "(?m)^(((([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))|((([a-zA-Z]|[a-zA-Z][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)+([A-Za-z|[A-Za-z][A-Za-z0-9\‌​-]*[A-Za-z0-9])))$" Local $sString = "foo" & @CRLF & _ "foo.bar" & @CRLF & _ "www.foo.bar" & @CRLF & _ "" & @CRLF & _ ".foo" & @CRLF & _ "foo." & @CRLF & _ "foo.com." & @CRLF & _ ".com.bar" & @CRLF & _ "" & @CRLF & _ "foo-bar.com" & @CRLF & _ "foo-bar.com-eu" & @CRLF & _ "foo.bar.com" & @CRLF & _ "" & @CRLF & _ "0.foo.bar" & @CRLF & _ "foo.1.bar" & @CRLF & _ "foo.bar.2" & @CRLF & _ ".1.bar.com" & @CRLF & _ "" & @CRLF & _ "foo.bar1.com" & @CRLF & _ "foo.2bar.com" & @CRLF & _ "foo.bar3.com" & @CRLF & _ "foo.bar.4com" & @CRLF & _ "" & @CRLF & _ "127" & @CRLF & _ "127.0" & @CRLF & _ "127.0.0" & @CRLF & _ "127.0.0.1" & @CRLF & _ "" & @CRLF & _ ".127" & @CRLF & _ ".127.0" & @CRLF & _ ".127.0.0" & @CRLF & _ ".127.0.0.1" & @CRLF & _ "" & @CRLF & _ "8.8.8.8" & @CRLF & _ "8.8.4.4" & @CRLF & _ "" & @CRLF & _ "c:/" & @CRLF & _ "c:/foo/" & @CRLF & _ "c:/foo/bar/" & @CRLF & _ "" & @CRLF & _ "\\" & @CRLF & _ "\\foo" & @CRLF & _ "\\foo.bar" & @CRLF & _ "\\foo\bar" & @CRLF & _ "" & @CRLF & _ "http://regexp101.com" & @CRLF & _ "regexp101.com" & @CRLF & _ "www.regexp101.com" & @CRLF & _ "www.regexp101.com/" 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