Regular Expressions 101

Save & Share

  • Regex Version: ver. 4
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

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

Code Generator

Language

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "http://www\.myurl\.com/\?action=joingiveaway&amp;id=([0-9]+)" Local $sString = " " & @CRLF & _ "" & @CRLF & _ " <DIV>" & @CRLF & _ " <H2><A style="COLOR: black" href="http://www.myurl.com/?action=viewgiveaways&amp;id=287">New car Giveaway</A></H2></DIV>" & @CRLF & _ " <DIV style="MARGIN-TOP: 6px">The Winner of this giveaway will win a new car!</DIV>" & @CRLF & _ " <DIV class=box_round style="BORDER-TOP: red 1px solid; BORDER-RIGHT: red 1px solid; BORDER-BOTTOM: red 1px solid; PADDING-BOTTOM: 8px; PADDING-TOP: 8px; PADDING-LEFT: 8px; BORDER-LEFT: red 1px solid; MARGIN-TOP: 10px; PADDING-RIGHT: 8px">" & @CRLF & _ " <DIV><B>Special Requirement : </B></DIV>" & @CRLF & _ " <DIV style="MARGIN-TOP: 2px">You need to have earned atleast <B style="COLOR: blue">1000 Coins </B>in total to enter this Giveaway </DIV>" & @CRLF & _ " <DIV style="COLOR: green; MARGIN-TOP: 2px">Your total coin earnings is 21707 </DIV></DIV>" & @CRLF & _ " <DIV style="MARGIN-TOP: 6px"><B>Entry Fee : 20 Coins</B></DIV>" & @CRLF & _ " <DIV style="MARGIN: 6px"><A class=cssbutton style="COLOR: white" href="http://www.myurl.com/?action=joingiveaway&amp;id=287">Enter Giveaway</A><BR><SMALL>You have 0 entries</SMALL></DIV></DIV>" & @CRLF & _ " <DIV style="FLOAT: right">" & @CRLF & _ " <DIV>Group : Everyone</DIV>" & @CRLF & _ " <DIV>Multiple Entries : No</DIV>" & @CRLF & _ " <DIV>Total Entries : <A href="http://www.myurl.com/?action=viewentries&amp;giveawayid=287">4</A></DIV>" & @CRLF & _ " <DIV>Max Entries : 100</DIV>" & @CRLF & _ " <DIV>Start Date : Jan 23 2013</DIV>" & @CRLF & _ " <DIV><A href="http://www.myurl.com/index.php?action=faq#coins" target=_blank>How To Earn Coins?</A></DIV></DIV>" & @CRLF & _ " <DIV style="CLEAR: both"></DIV></DIV></DIV></DIV>" & @CRLF & _ " <DIV class=index-left style="FLOAT: right; PADDING-TOP: 15px; PADDING-RIGHT: 23px">" & @CRLF & _ " <DIV class=left-section>" & @CRLF & _ "" & @CRLF & _ "" 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