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

`
`
gm

Test String

Code Generator

Language

Generated Code

use strict; my $str = '@DethDeelinDale DALE BUB⁉️\\n\\nU ALRIT⁉️\\n\\nU NEED BAKUP⁉️ RT @DethDeelinDale: WHO N THE FUK R U #DIKS⁉️\\n\\nHOLEE FUK‼️ PUT DEM \\uD83D\\uDD2B AWAY!!!\\n\\nU kan hav the \\uD83D\\uDCB0 I dun giv a fuk bout dat!!!\\n\\nHear u go…jus ta… @DethDeelinDale Waz rong dale⁉️\\n\\nWaz it a menshall er 1 a em lite \\uD83D\\uDEAC⁉️\\n\\nI dun HAYT thoz‼️\\n\\nNuthin but #MarbReds\\uD83D\\uDEAC 4 me‼️ WAT N THE FLYIN FUK⁉️\\n\\nHEY, U DUM B!TCH, PULL UP UR FN \\uD83D\\uDC56‼️\\n\\nU KANT NOT FRIGGEN \\uD83D\\uDCA9 HER‼️\\n\\nI swar 2 fn God, thez #ratards\\uD83E\\uDD24 @ friggen @Walmart r gonna dun mayk me looz mi fn mind!!! \\uD83E\\uDD2C\\uD83E\\uDD2C https://t.co/xsQg26SWIk WOOD U HUREE THE FUK UP U STUPID LITLE KIDS N GET ON UR GOD DAM SKOOL \\uD83D\\uDE8C!!! \\uD83E\\uDD2C\\n\\nU MOTHAFUKERS R GONNA DUN MAYK ME LAYT AGAN 2 MI JOB #HAWLINKARTS\\uD83D\\uDED2 @Walmart‼️\\n\\nThas it! I aint not got Tim 4 this, Im passin thez fn ratards!!! \\uD83D\\uDCA8\\n\\nOhhhh fukkkkk... \\uD83D\\uDEA8\\uD83D\\uDE94\\uD83E\\uDD26\\uD83C\\uDFFB‍♂️\\uD83E\\uDD26\\uD83C\\uDFFB‍♂️ WAR N TYE FLYIN FUK M I N WAT HAPND 2 MI FN \\uD83D\\uDC56!!!??? @DethDeelinDale Wat 4 bub⁉️ U dun need mi #glock \\uD83D\\uDD2B??? RT @DethDeelinDale: I NEEDA #GAT \\uD83D\\uDD2B‼️ RT @DethDeelinDale: BOOOOOMMMMM‼️ \\n\\nDAS WAT I THOT #BALDYBILL \\uD83D\\uDC68\\uD83C\\uDFFB‍\\uD83E\\uDDB2‼️\\n\\nU cum talkin all dat SHIT 2 me n think u waznt gonna get put 2 fukin… Hapins 2 the best a us! \\uD83D\\uDC56\\uD83D\\uDCA9 https://t.co/TVzch1v0du RT @HistoryMuppet: This is a brilliant example of the Muppet team going that extra step with a gag \\uD83D\\uDE02\\n(look closely at those “Written By” cr… RT @BroadwayWorld: .@MusicManBway will close on Broadway on January 1, 2023. https://t.co/8sMQ3LUsnA RT @TWJSciNat: Are you feeling lucky? \\n\\nThe latest episode of Mysteries of Science, starring @DerrenBrown is now live. \\n\\n\\uD83D\\uDD17Listen at https:/… RT @JustinRYoung: Very excited to finally release @DontExplainPod, the latest from @DogPonyAudio.\\n\\nEvery cliche and trope began as a brilli… RT @Justin_Willman: People love me on holidays https://t.co/Ft1udKGydl RT @BroadwaySym: Shana Tova! Wishing eveyone a sweet new year filled w/ many blessings in #stagemanagement &amp; #smlife! May the year bring yo… RT @memgrizz: #BeyondGrit: Making Magic w/ @jacob_laravia3 + @droddy22 \\uD83E\\uDE84 \\n\\nIn this episode, LaRavia &amp; Roddy link up with Piff The Magic Dra… RT @BroadwayWorld: Obituary: Rita Gardner, Original Luisa in THE FANTASTICKS, Passes Away at 87\\nhttps://t.co/GClzbN6Mii Oh no! Broadway legend \\uD83D\\uDE22\\uD83D\\uDE22 RIP https://t.co/J7JXoEmEYZ RT @levarburton: Happy Rosh Hashanah, y’all! #ShanaTova \\uD83D\\uDC9C\\uD83D\\uDE4F\\uD83C\\uDFFE \\u@83D \\u#123 \\u(223'; my $regex = qr`(\\\w\\\w)|(\\[u][A-Za-z0-9A@#\\(]{4})|([\\][n])`mp; if ( $str =~ /$regex/g ) { print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n"; # print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n"; # print "Capture Group 2 is $2 ... and so on\n"; } # ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p' # Named capture groups can be called via $+{name}

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 Perl, please visit: http://perldoc.perl.org/perlre.html