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

/
/
gm

Test String

Substitution

Processing...

Code Generator

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "(?m)(\[)(\d+)(\].*')(.+)(')" Local $sString = " [1] = 0 'NumProgPlc' " & @CRLF & _ " [2] = 3 'PadCode' " & @CRLF & _ " [3] = 2 'TablePos' " & @CRLF & _ " [4] = 1 'CurrentTool' " & @CRLF & _ " [5] = 0 'Loc. Override' " & @CRLF & _ " [10] = .200000 'PlaceDelay' " & @CRLF & _ " [11] = .300000 'PickDelay' " & @CRLF & _ " [12] = .150000 'ChamfersChkDelay' " & @CRLF & _ " [15] = -107.575500 'xLpos' " & @CRLF & _ " [16] = 398.586304 'yLpos' " & @CRLF & _ " [17] = 277.373779 'zLpos' " & @CRLF & _ " [18] = 90.000000 'RotApproNasAlim' " & @CRLF & _ " [21] = 53 'PR Offset Tavola' " & @CRLF & _ " [22] = 110 'PR Sopra Tavola' " & @CRLF & _ " [23] = 267 'DO Magnete ON' " & @CRLF & _ " [24] = 268 'DO Magnete OFF' " & @CRLF & _ " [25] = 243 'DI PresPastTav' " & @CRLF & _ " [26] = 247 'DI PezNoPrelTav' " & @CRLF & _ " [27] = 1 'DO Soffio' " & @CRLF & _ " [28] = 111 'PR Tavola+20' " & @CRLF & _ " [29] = 112 'PR Tavola' " & @CRLF & _ " [30] = 0 '_Prelevato' " & @CRLF & _ " [31] = 0 '_ScartoTav' " & @CRLF & _ " [32] = 0 '_ScartoCtrlUs' " & @CRLF & _ " [33] = 0 '_ScambioTav' " & @CRLF & _ " [34] = 0 '_CaricoTav' " & @CRLF & _ " [35] = 1 'FlagMemPtoNasAli' " & @CRLF & _ " [36] = 244 'DO PezPrelTav' " & @CRLF & _ " [37] = 243 'DO PezScamTav' " & @CRLF & _ " [38] = 242 'DO PezDepoTav' " & @CRLF & _ " [39] = 132 'PR Tavola+50' " & @CRLF & _ " [45] = 229 'DI PezPrelNas' " & @CRLF & _ " [46] = 1 'OK_PRL' " & @CRLF & _ " [50] = 1 'PrioritaNas' " & @CRLF & _ " [51] = 0 'CaricoNas' " & @CRLF & _ " [55] = 0 'Conveyor2Rot180' " & @CRLF & _ " [200] = 3.216000 'TC' " & @CRLF & _ "" Local $sSubst = "R\t\2\t\4" 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