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

/
/
g

Test String

Substitution

Processing...

Code Generator

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(<span\b[^""]+class=""TagsStyle""[^>]*>|(?!\A)\G)([^,<]+)(,?\s*)"; string substitution = @"\1<a href=""../search.php?searchQuery=\2"">\2</a>\3"; string input = @"<div align=""center""> <span class=""CatTStyle"">Category:</span> <span class=""CatStyle"">PHYSIOTHERAPY</span> <br> <br> <span class=""BusTStyle"">Business Name:</span> <span class=""BusStyle"">Physio</span> <br> <span class=""PhTStyle"">Phone:</span> <span class=""PhStyle""><a onclick=""_gaq.push(['_trackEvent', 'Phone', 'Click to Call', document.title])"" href=""tel:555 5555"">555 5555 <img src=""img/call.png""></a></span> <br> <span class=""AddrTStyle"">Address:</span> <span class=""AddrStyle"">1 Street Rd, Town, Country</span> <br> <span class=""EmlTStyle"">Email:</span> <span class=""EmlStyle""><a onclick=""_gaq.push(['_trackEvent', 'Email', 'Click to Email', document.title])"" href=""mailto:email@email.com"">email@email.com</a></span> <br> <br> <span class=""WsTStyle"">Website:</span> <span class=""WsStyle""><a onclick=""_gaq.push(['_trackEvent', 'Website', 'Click to Website', document.title])"" href=""http://www.webiste.com"">www.website.com</a></span> <br> <br> <span class=""TagsTStyle"">PRODUCTS / SERVICES:</span> <span class=""TagsStyle"">PHYSIOTHERAPY, BACK PAIN, SPINE INJURY</span> <br> </div> <script async type=""text/javascript""> if ($(window).width() > 800) {document.write(""</td><td align='center' valign='top' width='350'>"");} if ($(window).width() < 800) {document.write(""</td></tr><tr><td align='center' valign='top' width='350'>"");} </script> <br> <div id=""map"" align=""left"" style=""text-align:left;""></div> <script type=""text/javascript""> var address='1 Street Rd, Town, Country'; var map = new google.maps.Map(document.getElementById('map'), { mapTypeId: google.maps.MapTypeId.TERRAIN, zoom: 15 }); var geocoder = new google.maps.Geocoder(); geocoder.geocode({ 'address': address }, function(results, status) { if(status == google.maps.GeocoderStatus.OK) { new google.maps.Marker({ position: results[0].geometry.location, map: map }); map.setCenter(results[0].geometry.location); } }); </script> "; Regex regex = new Regex(pattern); 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