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 = '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games/ C:\\Program Files\\ConEmu\\ConEmu\\Scripts;C:\\Users\\ArturAyukhanov\\AppData\\Local\\ovm\\current\\bin;C:\\Program Files\\ConEmu;C:\\Program Files\\ConEmu\\ConEmu;C:\\ProgramData\\DockerDesktop\\version-bin;C:\\Program Files\\Docker\\Docker\\Resources\\bin;C:\\Program Files (x86)\\Common Files\\Oracle\\Java\\javapath;C:\\OneScript\\bin\\;C:\\ProgramData\\Oracle\\Java\\javapath;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\ProgramData\\chocolatey\\bin;C:\\OneScript\\bin;C:\\Program Files\\Microsoft SQL Server\\130\\Tools\\Binn\\;C:\\Program Files\\dotnet\\;C:\\Program Files\\Java\\jdk1.8.0_131\\bin;C:\\HashiCorp\\Vagrant\\bin;C:\\Program Files\\OpenVPN\\bin;C:\\Program Files (x86)\\GitExtensions\\;C:\\cmd\\SonarScanner\\bin;C:\\Program Files\\nodejs\\;C:\\Program Files (x86)\\Microsoft SQL Server\\140\\Tools\\Binn\\;C:\\Program Files\\Microsoft SQL Server\\140\\Tools\\Binn\\;C:\\Program Files\\Microsoft SQL Server\\Client SDK\\ODBC\\130\\Tools\\Binn\\;C:\\Program Files\\Microsoft SQL Server\\140\\DTS\\Binn\\;C:\\Program Files (x86)\\Microsoft SQL Server\\Client SDK\\ODBC\\130\\Tools\\Binn\\;C:\\Program Files (x86)\\Microsoft SQL Server\\140\\DTS\\Binn\\;C:\\Program Files (x86)\\Microsoft SQL Server\\140\\Tools\\Binn\\ManagementStudio\\;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files (x86)\\Microsoft VS Code\\bin;C:\\Program Files\\Microsoft VS Code Insiders\\bin;C:\\Program Files\\Git\\cmd;C:\\Program Files\\Git\\mingw64\\bin;C:\\Program Files\\Git\\usr\\bin;C:\\Users\\ArturAyukhanov\\AppData\\Local\\ovm\\current\\bin;C:\\Users\\ArturAyukhanov\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Program Files (x86)\\Microsoft VS Code\\bin;C:\\OneScript\\bin;c:\\cmd;C:\\Users\\ArturAyukhanov\\AppData\\Local\\Pandoc\\;C:\\Program Files\\kdiff3;C:\\cmd\\allure\\bin;C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\Common7\\IDE\\CommonExtensions\\Microsoft\\CMake\\CMake\\bin;C:\\cmd\\SonarScanner\\bin;C:\\Users\\ArturAyukhanov\\AppData\\Roaming\\npm;;C:\\Users\\ArturAyukhanov\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Program Files\\JetBrains\\IntelliJ IDEA Community Edition 2018.3\\bin; PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC'; my $regex = qr/(\/.+:*)+|(:\\.+;*)+/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