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

/
/
g

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"<td align=\""left\"">\s*(<a href=\""http:\/\/www.proxynova.com\/proxy-server-list\/port-\d+|\d+).*?\s*<\/td>"; string input = @"<table width=""950"" class=""table"" id=""tbl_proxy_list""> <thead> <tr> <th>Proxy IP</th> <th>Proxy Port</th> <th>Last Check</th> <th nowrap=""nowrap""><span title=""Proxy Speed in bytes per second"">Proxy Speed</span></th> <th>Uptime</th> <th><span title=""The location of that particular proxy."">Proxy Country</span></th> <th>Anonymity </th> </tr> </thead> <tbody> <tr> <td align=""left""> <span class=""row_proxy_ip"">220.225.87.129</span> </td> <td align=""left""> <a href=""http://www.proxynova.com/proxy-server-list/port-8080"">8080</a> </td> <td align=""left""> <time class=""icon icon-check timeago"" datetime=""2016-03-14 12:58:53Z""></time> </td> <td align=""left""> <div class=""progress-bar"" data-value=""7.7100404"" title=""5855.0202""></div> </td> <td style=""text-align:center !important;""> <span style=""color:#009900;"">59%</span> </td> <td align=""left""> <img src=""//www.proxynova.com/assets/images/blank.gif"" class=""flag flag-in"" width=""15"" height=""11"" alt=""IN"" /> <a href=""/proxy-server-list/country-in/"">India <span class=""proxy-city""> - Chandannagar </span> </a> </td> <td align=""left""> <span class=""proxy_transparent"" style=""font-weight:bold; font-size:10px;"">Transparent</span> </td> </tr> <tr> <td align=""left""> <span class=""row_proxy_ip"">220.225.87.129</span> </td> <td align=""left""> <a href=""http://www.proxynova.com/proxy-server-list/port-8080"">8080</a> </td> <td align=""left""> <time class=""icon icon-check timeago"" datetime=""2016-03-14 12:58:53Z""></time> </td> <td align=""left""> <div class=""progress-bar"" data-value=""7.7100404"" title=""5855.0202""></div> </td> <td style=""text-align:center !important;""> <span style=""color:#009900;"">59%</span> </td> <td align=""left""> <img src=""//www.proxynova.com/assets/images/blank.gif"" class=""flag flag-in"" width=""15"" height=""11"" alt=""IN"" /> <a href=""/proxy-server-list/country-in/"">India <span class=""proxy-city""> - Chandannagar </span> </a> </td> <td align=""left""> <span class=""proxy_transparent"" style=""font-weight:bold; font-size:10px;"">Transparent</span> </td> </tr> <tr> <td align=""left""> <span class=""row_proxy_ip"">220.225.87.129</span> </td> <td align=""left""> 80 </td> <td align=""left""> <time class=""icon icon-check timeago"" datetime=""2016-03-14 12:58:53Z""></time> </td> <td align=""left""> <div class=""progress-bar"" data-value=""7.7100404"" title=""5855.0202""></div> </td> <td style=""text-align:center !important;""> <span style=""color:#009900;"">59%</span> </td> <td align=""left""> <img src=""//www.proxynova.com/assets/images/blank.gif"" class=""flag flag-in"" width=""15"" height=""11"" alt=""IN"" /> <a href=""/proxy-server-list/country-in/"">India <span class=""proxy-city""> - Chandannagar </span> </a> </td> <td align=""left""> <span class=""proxy_transparent"" style=""font-weight:bold; font-size:10px;"">Transparent</span> </td> </tr> </tbody> </table>"; foreach (Match m in Regex.Matches(input, pattern)) { 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