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 = 'Power Scheme GUID: 381b4222-f694-41f0-9685-ff5bb260df2e (Balanced) GUID Alias: SCHEME_BALANCED Subgroup GUID: 238c9fa8-0aad-41ed-83f4-97be242c8f20 (Sleep) GUID Alias: SUB_SLEEP Power Setting GUID: 29f6c1db-86da-48c5-9fdb-f2b67b1f44da (Sleep after) GUID Alias: STANDBYIDLE Minimum Possible Setting: 0x00000000 Maximum Possible Setting: 0xffffffff Possible Settings increment: 0x00000001 Possible Settings units: Seconds Current AC Power Setting Index: 0x00000708 Current DC Power Setting Index: 0x00000384 Power Setting GUID: 94ac6d29-73ce-41a6-809f-6363ba21b47e (Allow hybrid sleep) GUID Alias: HYBRIDSLEEP Possible Setting Index: 000 Possible Setting Friendly Name: Off Possible Setting Index: 001 Possible Setting Friendly Name: On Current AC Power Setting Index: 0x00000001 Current DC Power Setting Index: 0x00000001 Power Setting GUID: 9d7815a6-7ee4-497e-8888-515a05f02364 (Hibernate after) GUID Alias: HIBERNATEIDLE Minimum Possible Setting: 0x00000000 Maximum Possible Setting: 0xffffffff Possible Settings increment: 0x00000001 Possible Settings units: Seconds Current AC Power Setting Index: 0x00002a30 Current DC Power Setting Index: 0x00002a30 Power Setting GUID: bd3b718a-0680-4d9d-8ab2-e1d2b4ac806d (Allow wake timers) GUID Alias: RTCWAKE Possible Setting Index: 000 Possible Setting Friendly Name: Disable Possible Setting Index: 001 Possible Setting Friendly Name: Enable Possible Setting Index: 002 Possible Setting Friendly Name: Important Wake Timers Only Current AC Power Setting Index: 0x00000001 Current DC Power Setting Index: 0x00000001'; my $regex = qr/Allow hybrid sleep[\s\S]+?Current DC Power Setting Index:\s+(.+)\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