Regular Expressions 101

Save & Manage Regex

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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 single character of: a, b, c or d
    [[ab][cd]]
  • 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]
  • Character class intersection
    [\w&&[^\d]]
  • 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
Processing...

Test String

Code Generator

Language

Generated Code

use strict; my $str = '2422072021115242 GU32120300002689543200710020 489346250700918BE0D011 0022072021114833700918BE0D1 04D10790201AEA005 543200710020 1 5 543200310050 100 0 5 5491127654295 1 0 22072021114834 65535 655356553565535655356553565535 3 0 X700 '; my $regex = qr/^(.{2})(.{14}).{14}(.{8})(.{8})(.{20})(.{8})(.{1})(.{10}).{2}.{2}(.{2})(.{14}).{10}.{5}(.{16})(.{3})(.{18}).{15}.{15}.{6}.{6}.{2}.{3}.{18}.{10}(.{2}).{3}.{32}.{2}(.{10})(.{15}).{38}.{5}.{5}.{5}.{5}.{5}.{5}(.{16})(.{16})(.{20})(.{3})(.{3})(.{2})(.{20})(.{5})(.{15})(.{10}).{3}.{3}(.{2})(.{24})(.{3})(.{20})(.{2}).{24}(.{6}).{6}.{10}(.{3}).{3}.{3}(.{3})(.{3})(.{5})(.{3})(.{2}).{2}(.{5}).{2}.{20}.{5}.{20}.{2}.{3}.{2}.{5}.{325}(.{14}).{3}.{24}.{25}.{20}.{1}.{1}.{2}.{5}.{3}.{3}.{3}.{6}.{4}.{3}(.{5})(.{5})(.{3})(.{1})(.{3})/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