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

/
/
gm

Test String

Code Generator

Language

Generated Code

use strict; my $str = 'https://www.bugaboo.com/gb-en/car-seat/ https://www.bugaboo.com/es-es/silla-de-coche/ https://www.bugaboo.com/es-en/car-seat/ https://www.bugaboo.com/fr-fr/siege-auto/ https://www.bugaboo.com/fr-en/car-seat/ https://www.bugaboo.com/de-de/autokindersitz/ https://www.bugaboo.com/de-en/car-seat/ https://www.bugaboo.com/nl-nl/autostoel/ https://www.bugaboo.com/nl-en/car-seat/ https://www.bugaboo.com/sv-se/babyskydd/ https://www.bugaboo.com/se-en/car-seat/ https://www.bugaboo.com/it-it/seggiolino-auto/ https://www.bugaboo.com/it-en/car-seat/ https://www.bugaboo.com/dk-en/car-seat/ https://www.bugaboo.com/at-de/autokindersitz/ https://www.bugaboo.com/at-en/car-seat/ https://www.bugaboo.com/be-fr/siege-auto/ https://www.bugaboo.com/be-en/car-seat/ https://www.bugaboo.com/be-nl/autostoel/ https://www.bugaboo.com/ie-en/car-seat/ https://www.bugaboo.com/fi-en/car-seat/ https://www.bugaboo.com/hu-en/car-seat/ https://www.bugaboo.com/hr-en/car-seat/ https://www.bugaboo.com/si-en/car-seat/ https://www.bugaboo.com/lu-fr/siege-auto/ https://www.bugaboo.com/lu-en/car-seat/ https://www.bugaboo.com/cz-en/car-seat/ https://www.bugaboo.com/pt-en/car-seat/ https://www.bugaboo.com/sk-en/car-seat/'; my $regex = qr/https\:\/\/www\.bugaboo\.com\/.{2}\-.{2}\/(silla\-de\-coche|siege\-auto|autostoel|autokindersitz|car\-seat|babyskydd|seggiolino\-auto)\//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