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 = @"(\s|\S){0,40}\""([0-9]{1,3})\""\;\}"; string input = @"a:1:{s:2:""gr"";s:3:""214"";} a:1:{s:2:""gr"";s:3:""188"";} a:1:{s:2:""gr"";s:3:""213"";} a:1:{s:2:""gr"";s:3:""169"";} a:1:{s:2:""gr"";s:3:""219"";} a:1:{s:2:""gr"";s:3:""221"";} a:1:{s:2:""gr"";s:3:""211"";} a:1:{s:2:""gr"";s:3:""184"";} a:1:{s:2:""gr"";s:3:""191"";} a:1:{s:2:""gr"";s:2:""16"";} a:1:{s:2:""gr"";s:3:""127"";} a:1:{s:2:""gr"";s:3:""217"";} a:1:{s:2:""gr"";s:3:""200"";} a:1:{s:2:""gr"";s:3:""182"";} a:1:{s:2:""gr"";s:3:""128"";} a:1:{s:2:""gr"";s:2:""17"";} a:1:{s:2:""gr"";s:3:""163"";} a:1:{s:2:""gr"";s:3:""212"";} a:1:{s:2:""gr"";s:3:""166"";} a:1:{s:2:""gr"";s:2:""94"";} a:1:{s:2:""gr"";s:2:""83"";} a:1:{s:2:""gr"";s:2:""27"";} a:1:{s:2:""gr"";s:2:""28"";} a:1:{s:2:""gr"";s:3:""167"";} a:1:{s:2:""gr"";s:3:""168"";} a:1:{s:2:""gr"";s:3:""202"";} a:1:{s:2:""gr"";s:1:""7"";} a:1:{s:2:""gr"";s:3:""129"";} a:1:{s:2:""gr"";s:3:""183"";} a:1:{s:2:""gr"";s:2:""26"";} a:1:{s:2:""gr"";s:3:""185"";} a:1:{s:2:""gr"";s:3:""175"";} a:1:{s:2:""gr"";s:2:""29"";} a:1:{s:2:""gr"";s:3:""209"";} a:1:{s:2:""gr"";s:3:""177"";} a:1:{s:2:""gr"";s:3:""178"";} a:1:{s:2:""gr"";s:2:""24"";} a:1:{s:2:""gr"";s:3:""225"";} a:1:{s:2:""gr"";s:3:""224"";} a:1:{s:2:""gr"";s:2:""57"";} a:1:{s:2:""gr"";s:2:""18"";} a:1:{s:2:""gr"";s:3:""208"";} a:1:{s:2:""gr"";s:3:""193"";} a:1:{s:2:""gr"";s:2:""33"";} a:1:{s:2:""gr"";s:2:""10"";} a:1:{s:2:""gr"";s:2:""11"";} a:1:{s:2:""gr"";s:2:""12"";} a:1:{s:2:""gr"";s:3:""173"";} a:1:{s:2:""gr"";s:2:""13"";} a:1:{s:2:""gr"";s:2:""14"";} a:1:{s:2:""gr"";s:1:""9"";} a:1:{s:2:""gr"";s:2:""15"";} a:1:{s:2:""gr"";s:3:""195"";} a:1:{s:2:""gr"";s:3:""130"";} a:1:{s:2:""gr"";s:2:""25"";} a:1:{s:2:""gr"";s:2:""50"";} a:1:{s:2:""gr"";s:3:""131"";} a:1:{s:2:""gr"";s:2:""96"";} a:1:{s:2:""gr"";s:2:""19"";} a:1:{s:2:""gr"";s:3:""107"";} a:1:{s:2:""gr"";s:3:""116"";} a:1:{s:2:""gr"";s:3:""364"";} a:1:{s:2:""gr"";s:3:""194"";} a:1:{s:2:""gr"";s:2:""44"";} a:1:{s:2:""gr"";s:3:""171"";} a:1:{s:2:""gr"";s:3:""172"";} a:1:{s:2:""gr"";s:3:""170"";} a:1:{s:2:""gr"";s:2:""20"";} a:1:{s:2:""gr"";s:2:""95"";} a:1:{s:2:""gr"";s:2:""84"";} a:1:{s:2:""gr"";s:2:""22"";} a:1:{s:2:""gr"";s:2:""23"";} a:1:{s:2:""gr"";s:2:""67"";} a:1:{s:2:""gr"";s:3:""118"";} a:1:{s:2:""gr"";s:2:""97"";} a:1:{s:2:""gr"";s:1:""6"";} a:1:{s:2:""gr"";s:3:""365"";} a:1:{s:2:""gr"";s:3:""190"";} a:1:{s:2:""gr"";s:2:""82"";} a:1:{s:2:""gr"";s:2:""42"";} a:1:{s:2:""gr"";s:2:""74"";} a:1:{s:2:""gr"";s:2:""76"";} a:1:{s:2:""gr"";s:2:""73"";} a:1:{s:2:""gr"";s:2:""78"";} a:1:{s:2:""gr"";s:2:""68"";} a:1:{s:2:""gr"";s:3:""207"";} a:1:{s:2:""gr"";s:3:""197"";} a:1:{s:2:""gr"";s:2:""77"";} a:1:{s:2:""gr"";s:2:""46"";} a:1:{s:2:""gr"";s:2:""51"";} a:1:{s:2:""gr"";s:3:""206"";} a:1:{s:2:""gr"";s:3:""165"";} a:1:{s:2:""gr"";s:2:""60"";} a:1:{s:2:""gr"";s:2:""61"";} a:1:{s:2:""gr"";s:2:""62"";} a:1:{s:2:""gr"";s:3:""187"";} a:1:{s:2:""gr"";s:3:""176"";} a:1:{s:2:""gr"";s:3:""196"";} a:1:{s:2:""gr"";s:3:""223"";} a:1:{s:2:""gr"";s:3:""117"";} a:1:{s:2:""gr"";s:2:""98"";} a:1:{s:2:""gr"";s:2:""47"";} a:1:{s:2:""gr"";s:3:""198"";} a:1:{s:2:""gr"";s:2:""45"";} a:1:{s:2:""gr"";s:3:""203"";} a:1:{s:2:""gr"";s:3:""205"";} a:1:{s:2:""gr"";s:3:""201"";} a:1:{s:2:""gr"";s:3:""115"";} a:1:{s:2:""gr"";s:2:""58"";} a:1:{s:2:""gr"";s:3:""204"";} a:1:{s:2:""gr"";s:3:""132"";} a:1:{s:2:""gr"";s:2:""48"";} a:1:{s:2:""gr"";s:2:""49"";} a:1:{s:2:""gr"";s:2:""99"";} a:1:{s:2:""gr"";s:3:""594"";} a:1:{s:2:""gr"";s:3:""585"";} a:1:{s:2:""gr"";s:3:""368"";} a:1:{s:2:""gr"";s:2:""81"";} a:1:{s:2:""gr"";s:2:""53"";} a:1:{s:2:""gr"";s:2:""52"";} a:1:{s:2:""gr"";s:3:""180"";} a:1:{s:2:""gr"";s:3:""181"";} a:1:{s:2:""gr"";s:3:""179"";} a:1:{s:2:""gr"";s:3:""164"";} a:1:{s:2:""gr"";s:3:""186"";} a:1:{s:2:""gr"";s:3:""174"";} a:1:{s:2:""gr"";s:3:""199"";} a:1:{s:2:""gr"";s:3:""210"";} a:1:{s:2:""gr"";s:3:""369"";} a:1:{s:2:""gr"";s:3:""370"";} a:1:{s:2:""gr"";s:3:""371"";} a:1:{s:2:""gr"";s:3:""372"";} a:1:{s:2:""gr"";s:3:""373"";} a:1:{s:2:""gr"";s:3:""374"";} a:1:{s:2:""gr"";s:3:""375"";}"; 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