use strict;
my $str = 'Nom : Positive Lookbehind
Description : Cette expression régulière ignore les 7 premiers caractères de la chaîne à vérifier
Utilitée : Peux notament s\'avérer utile lorsque l\'on souhaite ignorer les numéros des lignes en début de chaînes en cobol par exemple
■ Exemple 1 :
200420*-2004
■ Exemple 2 :
002003-More : 00 00020401
002004*-============================================================ 00021001
002005*-Descent : 16/08/17 at 16:32:59 MemoId : PORCHEYA 00022001
002006*-Reason : recup pour etre sur bonne version 00023001
002007*-More : 200418 00024001
002008*-============================================================ 00030000
002006*-Descent : 07/07/16 at 14:20:31 MemoId : DALESIAR 00040000';
my $regex = qr/(?<=^.{5}.)(?:.*)(2004)/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