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

r"
"
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

use strict; my $str = '{\\rtf1\\ansi\\ansicpg1252\\cocoartf2511\\cocoatextscaling0\\cocoaplatform0{\\fonttbl\\f0\\fswiss\\fcharset0 Helvetica;}{\\colortbl;\\red255\\green255\\blue255;}{*\\expandedcolortbl;;}\\margl1440\\margr1440\\vieww10800\\viewh8400\\viewkind0\\deftab560\\pard\\pardeftab560\\ri0\\partightenfactor0\\f0\\fs24 \\cf0 Say that this person is to blame\\0:20:48\\and the others that were involved.\\0:20:51\\And since we\'re not to blame 155 in fact,\\0:20:54\\innocent punishment is a way to\\0:20:56\\express this distribution of lame\\0:20:59\\in certain situation as such.\\0:21:01\\I punishment has,'; my $regex = qr/\\0[\d:]*\\+/mp; my $subst = ' '; 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