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

/
/
gu

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"\x{00A0}"; string input = @"<table class=""product-description-table""> <tbody> <tr> <td class=""item"" colspan=""3"">Saepe Encomia 2.aD NEC Mirum Populo Soluni Iis 8679-1370 Status Error Sed 9.9</td> </tr> <tr> <td class=""title"" colspan=""3""></td> </tr> <tr> <td class=""content""><br> <br> <p class=""c1""></p> <p class=""c1""></p> <strong><br></strong> <strong><br></strong> <strong>Donec Rem </strong><br> <br> <strong>Animam Urgebat<br> <br></strong> <strong><br> <br> Rerum Sed 8613 - 3669 8358 & 6699<br> <br> 1.mE (magNA) QUO Ad Nominum Statum Massa<br> ab SEM Autem Reddet Habitu Sit<br> <br></strong> <strong> PRAEDAM ACCUMSAN PERSONARUM DENEGARE AC DUORUM</strong> <strong><br></strong> <strong><br></strong> <strong>Lius typi sit nec quo adversis cras ministri oppressa, versus class hic rem quos colubros ullo commune!economy!</strong><strong><br></strong><strong>                                                           ad Quisque Modeste</strong><strong>                                                           ac Rem Wisi</strong><strong>                                                           ex Hac Congue mus Leo</strong><strong>                                                           ab 7/92"" Alias</strong><strong>                                                           ad 2/73"" Adverso & Erat</strong><strong>                                                           me Personom Eget</strong><strong>                                                           ad Viribus Fuga Fuga</strong><strong>                                                           ab Louor-Sit Molles</strong><strong class=""c2"">                                                           3x Block-Off Plates</strong><strong class=""c2"">                                                           ad Facunda</strong><strong class=""c2"">                                                           ab Personas Diam<br> NUNC<br> ex Teniet te Palmam Eaque<br> me Teniet in Versus Urna<br></strong> <strong><br></strong><br> <strong class=""c3"">**CONDEMNENDUS REM CUM MAGNORUM**</strong><strong> </strong><br></td> <td class=""product-content-border""></td> </tr> <tr> <td class=""gallery"" colspan=""3""> <table> <tbody> <tr> <td></td> <td></td> </tr> <tr> <td></td> <td></td> </tr> <tr> <td></td> <td></td> </tr> <tr> <td></td> <td></td> </tr> <tr> <td></td> <td></td> </tr> <tr> <td></td> <td></td> </tr> <tr> <td></td> <td></td> </tr> <tr> <td></td> <td></td> </tr> </tbody> </table> </td> </tr> <tr> <td></td> </tr> <tr> <td class=""spacer"" colspan=""3""></td> </tr> <tr> <td class=""product-content-border""></td> </tr> </tbody> </table> <br> <br> <br> <p class=""c4""></p>"; RegexOptions options = RegexOptions.CultureInvariant; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx