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 = '/* * PROJECT: Solitaire by Daniel "EmuandCo" Reimer * LICENSE: Freeware, permission to use under Public Domain * FILE: base/applications/games/solitaire/lang/en-US.rc * PURPOSE: English Language File for Solitaire * PROGRAMMERS: Daniel "EmuandCo" Reimer (reimer.daniel@freenet.de) */ IDS_NO_SUCH_FILE "FIND: %s: Plik nie został znaleziony\\n", 6, 15, 5 LTEXT_BLANK " " FONT 8, "Arial" 0 "Some text" 1 " Some text " 2000, "Lautus Theme" 2001, "Lautus Theme" "ffafa" MENU IDR_MENU_SCIENTIFIC_1 FONT 8, "MS Shell Dlg", 0, 0, 0x1 BEGIN GROUPBOX "", IDC_STATIC, 5 ,14, 141, 20 LTEXT "Plik ten może być używany przez system operacyjny lub przez\\n\\ inną aplikację. Modyfikacja tego pliku może spowodować uszkodzenie twojego\\n\\ systemu lub uczynić go mniej funkcjonalnym.\\n\\n\\ Czy na pewno chcesz otworzyć ten plik?", IDC_STATIC, 35, 5, 230, 60 DEFPUSHBUTTON "Tak", IDYES, 125, 55, 50, 14 IDS_USAGE "FIND: Wyświetla wszystkie linie danego pliku, zawierające szukany ciąg znaków.\\n\\n\\ FIND [ /C ] [ /I ] [ /N ] [ /V ] ""ciąg znaków"" [ plik... ]\\n\\ /I Ignoruje wielkość liter" IDS_NO_SUCH_FILE "FIND: %s: Plik nie został znaleziony\\n"'; my $regex = qr/^(?!FONT|2000)[^"\n]*"\K(?!\s+")([^"]+)/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