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

/
/
g

Test String

Code Generator

Language

Generated Code

use strict; my $str = ' 07 12 21 23 24*01+07+ 03+05+08+10+11+13+18+ 19+26+28+29+30+31+32 03+04+07+08+09+12 销 轡 时 间 ： 12 ． ． 14 07 ： ： 15 金 额 ： 28 元 A.34+13+13+13+15+35+98-12+12+12 1aaa -foosdsdsdTom Thumb 02+13+13+13+15*05+89-89+12 5s-90 1)红球： 8 10 11 18 20 24 29 23 34 藍球： 5 15 B. 红复 ： 99 10 11 18 20 24 29 藍复 ： 55 15 倍 数 ： 1 A.91 12 23 01 12 23 - 12 (1) ***01 12 23 9 12 23+88 (10) 3.01 12 23 9 55 23+ 88 (10) E:01 12 23 01 12 8 - 12 x999 '; my $regex = qr/(?:A|B|C|D|E|1\)|2\)|3\)|4\)|5\)){0,1}(?:\:|\.|\ ){0,1}[^0-9]{0,2}((?:[\d]{1,2}[\s|\+]{1}){0,4}[\d]{1,2})[\s]{0,1}\*[\s]{0,1}((?:[\d]{1,2}\+[\s]{0,2}){0,98}[\d]{1,2})(?![\+|\-|\d])[\s]{1,3}((?:[\d]{1,2}\+){0,98}[\d]{1,2})/p; 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