Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • 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

/
/
Ui

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 = "(?Ui)([a-z\-_0-9\/\:\.]*\.(jpg|jpeg|png|gif))" Local $sString = "<a style="display:block;" href="javascript:void(0);" onclick="expandImageRotate ( 'xImage_56362441','http://snpi.dell.com/snp/images/products/large/en-th~370-ACMK/370-ACMK.jpg',event,this,'' );"><img id="xImage_56362441_sm_Image" border="0" alt="Dell 8 GB Certified Replacement Memory Module for Select Dell Systems- UDIMM ECC" title="Dell 8 GB Certified Replacement Memory Module for Select Dell Systems- UDIMM ECC" width="200" src="http://snpi.dell.com/snp/images/products/mlrg/en-th~370-ACMK/370-ACMK.jpg" z></a>" & @CRLF & _ "</span></td></tr>" & @CRLF & _ "<tr><td colspan="2" style="padding: 15px 0px 5px 0px"><table cellpadding="4" cellspacing="0" align="center" border="0"><tr class="thumbnailRow"><td align="center"><table cellpadding="0" cellspacing="0" border="0">" & @CRLF & _ "<tr>" & @CRLF & _ "<td><img src="http://i.dell.com/images/global/brand/ui/top_left_small.gif" width="3" height="3"></td>" & @CRLF & _ "<td width="100%"><img src="http://i.dell.com/images/global/brand/ui/top_horiz_small.gif" width="100%" height="3" border="0"></td>" & @CRLF & _ "<td class="rightAlign"><img src="http://i.dell.com/images/global/brand/ui/top_right_small.gif" width="3" height="3"></td>" & @CRLF & _ "</tr>" & @CRLF & _ "<tr>" & @CRLF & _ "<td class="leftVertSmall"></td>" & @CRLF & _ "<td><span style="display:inline-block;width:40px;">" & @CRLF & _ "<script type="text/javascript">" & @CRLF & _ "RegisterImage('original_image', 'http://snpi.dell.com/snp/images/products/mlrg/en-th~370-ACMK/370-ACMK.jpg', 'http://snpi.dell.com/snp/images/products/large/en-th~370-ACMK/370-ACMK.jpg', "Dell 8 GB Certified Replacement Memory Module for Select Dell Systems- UDIMM ECC", 'xImage_18637405', '');" & @CRLF & _ "</script><div style="position: absolute; top: 0pt; left: 0pt;" id="xImage_18637405_container"></div>" 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