Regular Expressions 101

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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
Processing...

Test String

Substitution
Processing...

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(?:\h*<!-- ARTICOL START -->\R|\G)\K(?:(<p class=.*?</p>\R?)|(?:(?!<p class=.*?</p>)[\s\S])+)(?=[\s\S]+<!-- ARTICOL FINAL -->)"; string substitution = @"$1"; string input = @" <!-- ARTICOL START --> <div align=""justify""> <table width=""682"" border=""0""> <tr> <td><h1 class=""den_articol"" itemprop=""sfe"">My text here</h1></td> </tr> <tr> <td class=""text_dreapta"">On Ianuarie 14, 2014, in <a href=""https://neculaifantanaru.com/en/qualities-of-a-leader.html"" title=""See al articles from Qualities of a leader"" class=""external"" rel=""category tag"">Qualities of a leader</a>, by Author</td> </tr> </table> <h2 class=""text_obisnuit2""><img src=""index_files/sfa.jpg"" width=""718"" height=""605"" id=""sfs"" usemap=""#m_dgrnt"" alt=""hip"" /><map name=""tfAbonament"" id=""m_34""> <area shape=""rect"" coords=""259,545,457,582"" href=""#plata"" alt="" /> </map></h2> <p class=""den_articol"">Why this text text?</p> <p class=""text_obisnuit"">test text text</p> <p class=""text_obisnuit"">test text text</p> <p class=""text_obisnuit2"">test text text</p> </div> <p align=""justify"" class=""text_obisnuit style3"">&nbsp;</p> <!-- ARTICOL FINAL -->"; RegexOptions options = RegexOptions.Multiline; Regex regex = new Regex(pattern, options); string result = regex.Replace(input, substitution); } }

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