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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

Substitution

Processing...

Code Generator

Language

Generated Code

use strict; my $str = 'Movie.Title.2021.1080p.WEB.H264-GRUP-djf3.nzb Movie.Title.1982.1080p.WEB.H264-GRUP-asJ8.nzb Movie.Title.2021.1080p.WEB-DL.H264-GRUP-asd8.nzb Movie.Title.1982.1080p.WEB-DL.H264-GRUP.nzb Movie.Title.1957.1080p.WEB-DL.DTS-HD.7.1.x264-GRUP.nzb Movie.Title.2018.1080p.WEB-DL.DTS-HD.5.1.H264-GRUP-asid.nzb Movie.Title.2021.1080p.WEB-DL.H264-GRUP.nzb Movie.Title.1982.1080p.WEB-DL.H264-GRUP.nzb Movie.Title.2021.1080p.WEB-DL.H264-GRUP-kz9j.nzb Movie.Title.1982.1080p.WEB-DL.H264-GRUP-kk9j.nzb Movie.Title.1982.1080p.BluRay.DTS-HD.MA.7.1.H264-GRUP.nzb Movie.Title.1982.1080p.BluRay.DTS-HD.7.1.H264-GRUP.nzb Movie.Title.2018.1080p.BluRay.DTS-HD.5.1.H264-GRUP.nzb Movie.Title.1982.1080p.BluRay.DTS-X.7.1.H264-GRUP.nzb Movie.Title.1982.1080p.BluRay.DTS-X.H264-GRUP.nzb Movie.Title.1982.1080p.BluRay.DTS-HD.MA.7.1.H264-GRUP-ko9j.nzb Movie.Title.1982.1080p.BluRay.DTS-HD.7.1.H264-GRUP-kg9j.nzb Movie.Title.2018.1080p.BluRay.DTS-HD.5.1.H264-GRUP-ko9j.nzb Movie.Title.1982.1080p.BluRay.DTS-X.7.1.H264-GRUP-zo9j.nzb Movie.Title.1982.1080p.BluRay.DTS-X.H264-GRUP-k49j.nzb Movie.Title.1982.1080p.WEB-DL.DTS-HD.MA.7.1.H264-GRUP.nzb Movie.Title.1982.1080p.WEB-DL.DTS-HD.7.1.H264-GRUP.nzb Movie.Title.2018.1080p.WEB-DL.DTS-HD.5.1.H264-GRUP.nzb Movie.Title.1982.1080p.WEB-DL.DTS-X.7.1.H264-GRUP.nzb Movie.Title.1982.1080p.WEB-DL.DTS-X.H264-GRUP.nzb Movie.Title.1982.1080p.WEB-DL.DTS-HD.MA.7.1.H264-GRUP-ko4j.nzb Movie.Title.1982.1080p.WEB-DL.DTS-HD.7.1.H264-GRUP-kiij.nzb Movie.Title.2018.1080p.WEB-DL.DTS-HD.5.1.H264-GRUP-ko9j.nzb Movie.Title.1982.1080p.WEB-DL.DTS-X.7.1.H264-GRUP-kd96.nzb Movie.Title.1982.1080p.WEB-DL.DTS-X.H264-GRUP-koaj.nzb'; my $regex = qr/(\-[^-.\n]*)(\-.{4})?\.nzb$/mp; my $subst = '\\1.nzb'; my $result = $str =~ s/$regex/$subst/rg; print "The result of the substitution is' $result\n";

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