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

/
/

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 = "(.{3})(.{17})(.{17})(.{20})(.{20})(.{10})(.{6})(.{30})(.{8})(.{8})(.{17})(.{3})(.{10})(.{3})(.{10})(.{3})(.{15})(.{15})(.{30})(.{8})(.{17})(.{17})(.{2})(.{1})(.{10})(.{10})(.{10})(.{10})(.{10})(.{15})(.{15})(.{30})(.{30})(.{17})(.{17})(.{35})" Local $sString = "PRS00000001 00000999 F9A40A 992419 0000000001 8111437440 201602152016021500000000000000.00 3333333333 b1234567 SNAB111111GCVB2PO34567 0011111 0055555 DEN4444444444 5555555555 REG1111 REG2222 TRANID1 " & @CRLF & _ "PRS00000001 00000999 F9A40A 992419 0000000001 8111437440 201602152016021500000000000000.00 3333333333 b1234567 SNBB222222222ZZPO34567 0011111 0055555 DEN4444444444 5555555555 REG1111 REG2222 TRANID2 " & @CRLF & _ "PRS00000001 00000999 C7973A 992419 0000000001 8111437440 201602152016021500000000000000.00 3333333333 b1234567 SNCC3WDDDDDD123PO34567 0011111 0055555 DEN4444444444 5555555555 REG1111 REG2222 TRANID3 " & @CRLF & _ "PRS00000001 00000999 C7973A 992419 0000000001 8111437440 201602152016021500000000000000.00 3333333333 b1234567 SNDDDDD4R6F1111PO34567 0011111 0055555 DEN4444444444 5555555555 REG1111 REG2222 TRANID4 " 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