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

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(?<!cpc)((lifull-connect|facebook|mitula).*(referrer|referral))|bpihousingloans|rumah\.mitula|dotproperty\/blog-property-boost"; string input = @"lm.facebook.com facebook/social/listing en-gb.facebook.com lifull-connect/cpc/premium mitula/cpc/feed-client mitula/cpc/feed-default baan.mitula.in.th mitula/feed-client dotproperty/email/send-alert dotproperty/email/send-alert-interest dotproperty/email/enquiry dotproperty/email/click-to-call-property dotproperty/webpush/alert dotproperty/webpush/new-home dotproperty/android_app dotproperty.co.th dotpropertygroup.com facebook/cpc/[facebook][cpc][house][sale] lifull-connect/referrer/feed-client lifull-connect/referrer/feed-default directory.bpihousingloans.com lifull-connect/referrer/feed-featured rumah.mitula.co.id lifull-connect/referrer/feed-boost facebook/referral/[facebook][marketplace][condo][rent] dotproperty/blog-property-boost facebook/referral/[facebook][marketplace][house][rent] facebook/referral/[facebook][marketplace][townhouse][rent] mitula/referrer/feed-client facebook/referral/[facebook][marketplace][condo][sale]"; 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