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
No Match

`
`
gm

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"href=""(?!(?:/get/index\.php|\S*/PICSNUM/))([a-z0-9-_\/.]+)"; string input = @"<a href=""/video5505298733/travel_and_tourism_recovery_coronavirus."" title=""The places and companies missing tourist dollars most."">The places and companies missing tourist dollars most.</a></p><p class=""info""><span class=""bg""><span class=""duration"">10 min</span><a href=""/get/index.php?id=qafMsaaScGLPuKqGuanBpZjHtGHKppeHpJu5r6G9raaHoqa3tJS-ope5tJK6s5TLqp8""><span class=""name"">CORONAVIRUS</span></a><span><span class=""bolder""> - </span> 1.7k <span class=""bolder"">Views</span></span><span class=""text-disabled""><span class=""bolder""> - </span> 2 days ago</span><span class=""bolder""> - </span></span></p></div></div> <div class=""thumb-lock ""><div class=""thumb-big""><div class=""thumb""><a href=""/midia54891337/PICSNUM/russia_fire_coronavirus_patients_intl""><img src=""lightbox.gif"" data-src=""https://cdn-pic.cnews-cdn.com/videos/thumbs169/22/d3/a2/22d3a23423dfda7f5/22d3a2dfbb9fdfgd43f5.PICNUM.jpg"" /></a>"; RegexOptions options = RegexOptions.Multiline; 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