Regular Expressions 101

Save & Share

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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 = '<![CDATA[ Bonjour, La facture proforma de la demande n°INC0937639 a été mise à jour Pour accéder à ce dossier de nature &quot; demande &quot;, cliquer ici . Détail des informations : - Date de création : 21/03/2019 15:51:54 - Site concerné : o Nom : RRAA COURS LA VILLE (00363800) o Etage : o Bureau : o Adresse 1 : 55 RUE GEORGES CLEMENCEAU o Adresse 2 : o Ville : COURS LA VILLE o CP : 69470 o Téléphone : 0474647881 o Fax : 0474647888 - Horaires du site : o Statut : Ouvert LP : BERNARD,franck Lu=Fermé Fermé Ma=08H30-12H00 13H30-17H45 Me=08H30-12H00 13H30-17H45 Je=08H30-12H00 14H15-17H45 Ve=08H30-12H00 13H30-17H45 Sa=08H30-12H00 Fermé Di=Fermé Fermé - Demandeur : FILLON,LOREN,0474647881, - Logisticien : o Monsieur BERNARD, franck - Equipe d\'affectation :LP - Intervenant : BERNARD franck - Catégorie : MULTITECHNIQUE\\Petits travaux\\Menuiserie - Description du dossier : o Pose d\'une plaque pour boucher l\'ouverture sur la boite aux lettres bureau RA Pour accéder à ce dossier, cliquer ici . ]]> '; my $regex = qr/(?:demande|incident).*(?'num_externe'INC[0-9]*).*(?:\n.*)*Nom\s*:\s*(?'ins_libl'.*\)).*(?:\n.*)*Ville\s*:\s*(?'apt_localisation'.*?)\s*(?:\n.*)*-\s*Demandeur\s*:\s*(?'apt_nom'.*?,.*?),(?'apt_telephone'.*?),.*(?:\n.*)*Cat.gorie\s*:\s*(?'tsy_lib'.*?)\s*(?:\n.*)*\s*-.*Description.*?:\s*(?:\n.*)*\s*o\s*(?'commentaire_externe'.*?)\s*\n/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