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

Code Generator

Language

Generated Code

use strict; my $str = '3M™ Victory Series™ Bracket MBT™ 017-873, .022, UL3, 0T/8A, Hk, 5/Pack 5/Pack 3M™ BX™ Dual Reader Protective Eyewear 11458-00000-20, Clear Anti-Fog Lens, Silver/Black Frame, +2.0 Top/Bottom Diopter, 20 ea/Case 20 ea/Case 4220VDS-QCSHC/900-000/A CABINET EMPTY No units 3M™ Bumpon™ Protective Product SJ5476 Fluorescent Yellow, 3.000/Case 3.000/Case 3M™ Bumpon™ Protective Products SJ61A2 Black, 10,000/Case 10,000/Case QWERTYUI PN-DR, Coarse, TR, 1-1/2 in, 50/Carton, 200 ea/Case, Dispenser Pack 50/Carton, 200 ea/Case 2841 PC GREY AS/AF (20/CASE) 20/CASE TYPE.2 86421-K40-F000, 1 Set/Pack, 100 Packs/Case 1 Set/Pack, 100 Packs/Case RTYU 31655, 240+, 6 in, 50 Discs/Roll, 6 Rolls/Case 50 Discs/Roll, 6 Rolls/Case Clear, 1 in x 36 yd, 4.8 mil, 24 rolls per case 24 rolls per case 3M™ Victory Series™ Bracket MBT™ 017-873, .022, UL3, 0T/8A, Hk, 5/Pack 5/Pack 3M™ BX™ Dual Reader Protective Eyewear 11458-00000-20, Clear Anti-Fog Lens, Silver/Black Frame, +2.0 Top/Bottom Diopter, 20 ea/Case 20 ea/Case 4220VDS-QCSHC/900-000/A CABINET EMPTY No units 3M™ Bumpon™ Protective Product SJ5476 Fluorescent Yellow, 3.000/Case 3.000/Case 3M™ Bumpon™ Protective Products SJ61A2 Black, 10,000/Case 10,000/Case'; my $regex = qr/\b(?<!\d[,.])(?<!\d-)((?:\d+/)?\d+(?:[,.]\d+)*)\b(\s*(\w*)/)?\s*((?(2)\w+|\w+\s+per\s+\w+))(?=\s*(?:[,)]|$))/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