Regular Expressions 101

Save & Share

  • Regex Version: ver. 2
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

/
/

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"[-A-Za-z0-9+&@#\/%?=~_|!:,.;]+[-A-Za-z0-9+&@#\/%=~_|]manifest\.f4m(?=(""|\s))"; string input = @"{""feedtype"": ""playlist"", ""base_url"": ""http://feeds.xhis.com/rteavgen/player/"", ""feed_title"": ""Single Item Playlist"", ""feedid"": ""playlist"", ""alt_url"": ""http://www.xhis.com/player/#v=10322367"", ""platform"": ""iptv"", ""current_date"": ""2014-11-14T12:24:39.84167"", ""full_url"": ""http://feeds.xhis.com/rteavgen/player/playlist?type=iptv&showId=10343367"", ""shows"": [{""itemid"": 10332367, ""showid"": 11544367, ""valid_start"": ""2014-11-13T21:37:39"", ""ispodcast"": 0, ""programmeid"": 1, ""BRINumber"": ""ih011305791"", ""duration"": 2053247, ""id"": 10323367, ""media:group"": [{""rte:server"": ""http://vod.hds.xhis.com/hds-vod"", ""medium"": ""video"", ""url"": ""/2014/1113/20141113-dumbydoozle_cl10344367_10344406_260_/manifest.f4m"", ""type"": ""video/mp4"", ""i"; Match m = Regex.Match(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