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
No Match

/
/
gm

Test String

Substitution

Processing...

Code Generator

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "(?m)(&[A-Za-z]+?;)|(<.+?>)|(<\/\w+>)|([\w-]+)|([ ~!@#$%^&*()+=?:;"{}\[\]|,.\\/]+)" Local $sString = "This is more<p>Post server upgrade test on 9/13</p><p>Testing c360 release</p><p>&nbsp;</p><p><span title=\"Deleted by Chris Courtney - 12/16/2015 3:22pm\" class=\"del cts-1 non-editable\" data-mce-contenteditable=\"false\" data-time=\"1450297379217\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"4\">wifi</span><span title=\"Inserted by Chris Courtney - 12/16/2015 3:23pm\" class=\"ins cts-1\" data-time=\"1450297385376\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"8\">Life&nbsp;Preserver&nbsp;will</span> save <span title=\"Inserted by Chris Courtney - 12/16/2015 3:23pm\" class=\"ins cts-1\" data-time=\"1450297399510\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"28\">if&nbsp;the&nbsp;</span>internet cut<span title=\"Inserted by Chris Courtney - 12/16/2015 3:23pm\" class=\"ins cts-1\" data-time=\"1450297404606\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"35\">s&nbsp;</span>out<span title=\"Inserted by Chris Courtney - 12/16/2015 3:23pm\" class=\"ins cts-1\" data-time=\"1450297409071\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"42\">.</span><span title=\"Deleted by Chris Courtney - 12/16/2015 3:23pm\" class=\"del cts-1 non-editable\" data-mce-contenteditable=\"false\" data-time=\"1450297406872\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"37\"> test</span></p><p>&nbsp;</p><p>The Subject Property is owned by the&nbsp;Federal Deposit Insurance Corporation (FDIC) and consists of 10 Acres acres and is located&nbsp;on the [N/E/S/W] side of 440 Wheelers Farms Road, approximately&nbsp;[###] feet [N/E/S/W] of the intersection of&nbsp;between[STREETNAME] and [].porperty ocne upon a tmie The Subject Property is not&nbsp;currently occupied by [BRIEFLY DESCRIBE BUILDING, OCCUPANT AND USE]. This is me entering new text into 2.1. This is a bullet. Type text 123 spelling</p><p>&nbsp;</p><p>The Subject Property is owned by the <span title=\"Deleted by Chris Courtney\" class=\"trackChanges\">Federal Deposit Insurance Corporation</span> (FDIC) and consists of 10 Acres acres and is located on the [N/E/S/W] side of 440 Wheelers Farms Road, approximately [###] feet [N/E/S/W] of the intersection of between[STREETNAME] and []. The Subject Property is not currently occupied by [BRIEFLY DESCRIBE BUILDING, OCCUPANT AND USE]. This is me entering new text into 2.1.</p><p>&nbsp;</p><p>This is a bullet.EDR order right after (discussed geocoding concerns, we're all set there) test</p><p>&nbsp;</p><p>Type text 123 spelling The Subject Property is owned by the Federal Deposit Insurance Corporation (FDIC) and consists of 10 Acres acres and is located on the [N/E/S/W] side of 440 Wheelers Farms Road, approximately [###] feet [N/E/S/W] of the intersection of<span title=\"Added by Chris Courtney\" class=\"trackChanges\">/</span><span title=\"Deleted by Chris Courtney\" class=\"trackChanges\">&nbsp;</span>between[STREETNAME] and [].</p><p>&nbsp;</p><p>&nbsp;</p><p>The Subject Property is not currently occupied by [BRIEFLY DESCRIBE BUILDING, OCCUPANT AND USE].</p><p>This is me entering new text into 2.1. test</p><p>&nbsp;</p><p>This is a bullet.</p><p>&nbsp;</p><p>Type text 123 spellingThe Subject Property is owned by the Federal Deposit Insurance Corporation (FDIC) and consists of 10 Acres acres and is located on the [N/E/S/W] side of 440 Wheelers Farms Road, approximately [###] feet [N/E/S/W] of the intersection of between[STREETNAME] and [].</p><p>&nbsp;</p><p>&nbsp;</p><p>The Subject Property is not currently occupied by [BRIEFLY DESCRIBE BUILDING, OCCUPANT AND USE].</p><p>This is me entering new text into 2.1.</p><p>&nbsp;</p><p>This is a bullet.</p><p>&nbsp;</p><p>Type text 123 spellingThe Subject Property is owned by the Federal Deposit Insurance Corporation (FDIC) and consists of 10 Acres acres and is located on the [N/E/S/W] side of 440 Wheelers Farms Road, approximately [###] feet [N/E/S/W] of the intersection of between[STREETNAME] and [].</p><p>&nbsp;</p><p>&nbsp;</p><p>The Subject Property is not currently occupied by [BRIEFLY DESCRIBE BUILDING, OCCUPANT AND USE].</p><p>This is me entering new text into 2.1.</p><p>&nbsp;</p><p>This is a bullet.</p><p>&nbsp;</p><p>Type text 123 spellingThe Subject Property is owned by the Federal Deposit Insurance Corporation (FDIC) and consists of 10 Acres acres and is located on the [N/E/S/W] side of 440 Wheelers Farms Road, approximately [###] feet [N/E/S/W] of the intersection of between[STREETNAME] and [].</p><p>&nbsp;</p><p>&nbsp;</p><p>The Subject Property is not currentl<span title=\"Inserted by Chris Courtney - 06/12/2015 2:40pm\" class=\"ins cts-1\" data-time=\"1434134407587\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"2\">y</span> <span title=\"Inserted by Chris Courtney - 06/12/2015 2:40pm\" class=\"ins cts-1\" data-time=\"1434134414659\" data-username=\"Chris Courtney\" data-userid=\"4642\" data-cid=\"3\">this is a test.&nbsp;</span>occupied by [BRIEFLY DESCRIBE BUILDING, OCCUPANT AND USE].</p><p>This is me entering new text into 2.1.</p><p>&nbsp;</p><p>This is a bullet.</p><p>&nbsp;</p><p>Type text 123 spelling</p><p>&nbsp;</p><p>2014&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Schultz Motors of Milan<br> 2009-2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Dive Rite<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Procom Driving Services<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Schultz Motors of Milan - New and Used<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Schultz Motors of Milan -Part and Service<br> 2004-2003&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Adventure Driving<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Dive Rite<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Procom Driving Services<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Schultz Motors of Milan - New and Used<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Schultz Motors of Milan -Part and Service<br> 1999-1998&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Dive Rite<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Procom Driving Services<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schultz Motors of Milan - New and Used<br> 1994-1983&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Schultz Motors<br> 1979-1967&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Bruckner Oldsmobile</p><p>&nbsp;</p><p>&nbsp;132543467</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>Heh?" Local $sSubst = "|" 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